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mondofacto - Online Medical Dictionary Category: Health and Medicine > Medical Dictionary Date & country: 26/01/2008, UK Words: 116197

heterocrine
Denoting the secretion of two or more kinds of material. ... Origin: hetero-+ G. Krino, to separate ... (05 Mar 2000) ...

heterocrisis
Rarely used term for an irregular crisis, one occurring at an abnormal time or with unusual symptoms. ... (05 Mar 2000) ...

heterocyclic compound
Synonym for cyclic compound ... Any compound in which the constituent atoms, or any part of them, form a ring. Used mainly in organic chemistry where: 1) numerous compound's contain rings of carbon atoms (carbocyclic compound's) or carbon atoms plus one or more atoms of other types (heterocyclic compound's), usually nitrogen, oxygen, or sulfur; 2) w …

heterocyclic compounds
Ring compounds having atoms other than carbon in their nuclei. ... (12 Dec 1998) ...

heterocyclic compounds, 1-ring
A class of organic compounds containing a ring structure made up of more than one kind of atom, usually carbon plus another atom. The ring structure can be aromatic or nonaromatic. ... (12 Dec 1998) ...

heterocyclic compounds, 2-ring
A class of organic compounds containing two ring structures, one of which is made up of more than one kind of atom, usually carbon plus another atom. The heterocycle may be either aromatic or nonaromatic. ... (12 Dec 1998) ...

heterocyclic compounds, 3-ring
A class of organic compounds containing three ring structures, one of which is made up of more than one kind of atom, usually carbon plus another atom. The heterocycle may be either aromatic or nonaromatic ... (12 Dec 1998) ...

heterocyclic oxides
Oxides of a ring compound having atoms other than carbon in its ring. ... (12 Dec 1998) ...

heterocyst
<biology> Specialised cell type found at regular intervals along the filaments of certain Cyanobacteria, site of nitrogen fixation. ... (18 Nov 1997) ...

heterocytotropic
Having an affinity for cells of a different species. ... Origin: hetero-+ G. Kytos, cell, + trope, a turning toward ... (05 Mar 2000) ...

heterocytotropic antibody
A cytotropic antibody (chiefly of the IgG class) similar in activity to homocytotropic antibody, but having an affinity for cells of a different species rather than for cells of the same or a closely related species. ... (05 Mar 2000) ...

heterodermic
An obsolete term denoting skin grafting in which the grafts are taken from the skin of an animal of another species (dermatoheteroplasty). ... Origin: hetero-+ G. Derma, skin ... (05 Mar 2000) ...

heterodetic peptide
A peptide that contains peptide bonds as well as covalent linkages between certain amino acid residues that are not peptide bonds; e.g., valinomycin, oxytocin. ... Origin: hetero-+ G. Detos, bound, fr. Deo, to bind, + -ic ... (05 Mar 2000) ...

heterodimer
<biochemistry> A dimer in which the two subunits are different. ... One of the best known examples is tubulin that is found as an _ tubulin/_ tubulin dimer. Heterodimers are relatively common and it may be that the arrangement has the advantage that, for example: several different binding subunits may interact with a conserved signalling subun …

heterodisperse
Of varying size; describing aerosols whose particles are not uniform in size. ... (05 Mar 2000) ...

heterodisulfide reductase
<enzyme> A two-subunit cytochrome b-containing enzyme from methanol-grown methanosarcina barkeri; catalyses the terminal step in the energy-conserving electron transport chain in methanogenic archaea; has been sequenced; authors give EC number as 1.99.4.- (not in enzyme nomenclature) ... Registry number: EC 1.12.99.- ... (26 Jun 1999) ...

Heterodoxus spiniger
A biting louse of the dog, sometimes called the kangaroo louse. ... (05 Mar 2000) ...

heteroduplex
<molecular biology> DNA in which the two strands are different, either of different heritable origin, formed in vitro by annealing similar strands with some complementary sequences or formed of mRNA and the corresponding DNA strand. ... (18 Nov 1997) ...

heteroduplex DNA
<molecular biology> This is DNA that contains complementary strands from two different DNA molecules with similar sequences. ... (09 Oct 1997) ...

heteroduplex mapping
<molecular biology> Heteroduplex mapping is a lab technique used to locate a particular sequence of nucleotides. It involves making a heteroduplex by pairing the unknown nucleic acid strand with a reference strand which has a known sequence. ... (09 Oct 1997) ...

heterodymus
Unequal conjoined twins in which the incomplete parasite, consisting of head and neck and, to some extent, thorax, is attached to the anterior surface of the autosite. ... See: conjoined twins. ... Origin: hetero-+ G. Didymos, twin ... (05 Mar 2000) ...

heteroecious
<microbiology> Term used to describe a parasite that uses more than one hosts during its life cycle. ... Compare: autoecious. ... (09 Oct 1997) ...

heteroerotic
Having to do with sexual excitement toward the opposite sex. By contrast with alloerotic. ... (12 Dec 1998) ...

heteroeroticism
A condition of sexual excitement brought about by congress with a person of the opposite sex. ... (05 Mar 2000) ...

heteroerotism
Synonym for alloerotism ... Sexual attraction toward another person. ... Compare: autoerotism. ... Synonym: alloeroticism, heteroerotism. ... Origin: allo-+ G. Eros, love ... (05 Mar 2000) ...

heterofermentation
<chemistry> Any fermentation in which there is more than one major end-product. ... Synonym: heterolactic fermentation. ... (09 Oct 1997) ...

heterogametic
Having sex gametes of contrasting types; human males are heterogametic. ... Synonym: digametic. ... Origin: hetero-+ G. Gametikos, connubial ... (05 Mar 2000) ...

heterogametic embryo
A male embryo with XY karyotype. ... (05 Mar 2000) ...

heterogametic sex
<biology> The gender which has two different sex chromosomes. ... For example: In humans, the male is heterogametic because he is XY (has an X chromosome and a Y chromosome). ... In birds, the female is heterogametic because she is WZ (has a W chromosome and a Z chromosome). ... Compare: homogametic sex. ... (09 Oct 1997) ...

heterogamous
<plant biology> Producing flowers of two or more kinds with respect to their fertile organs, for example male and female or bisexual and female. ... Compare: homogamous. ... (09 Oct 1997) ...

heterogamy
<plant biology> The condition in a flowering plant species of having two or more types of flowers. For example: flowers which have only male parts along with flowers which have only female parts. ... Compare: homogamy. ... The condition in a flowering plant species where both the male and female parts of the flower mature at the same time, so t …

heterogeneic antigen
Synonym for heterophile antigen ... An antigen or antigenic determinant which is found in different tissues in more than one species. ... (05 Mar 2000) ...

heterogeneity
The condition or state of being different in kind or nature. ... (05 Dec 1998) ...

heterogeneous
<pathology> Composed of varied cell types. ... (16 Dec 1997) ...

heterogeneous catalysis
<chemistry> A form of catalysis in which the catalyst is in different physical state than the reactants. ... (09 Jan 1998) ...

heterogeneous nuclear RNA
An ill-defined form of RNA, of high molecular weight, that never leaves the nucleus and is thought to be the precursor of messenger RNA. ... (05 Mar 2000) ...

heterogeneous radiation
Radiation consisting of different frequencies, various energies, or a variety of particles. ... (05 Mar 2000) ...

heterogeneous system
In chemistry, a system that contains various distinct and mechanically separable parts or phases; e.g., a suspension or an emulsion. ... (05 Mar 2000) ...

heterogenesis
1. <biology> Spontaneous generation, so called. ... 2. <biology> That method of reproduction in which the successive generations differ from each other, the parent organism producing offspring different in habit and structure from itself, the original form, however, reappearing after one or more generations; opposed to homogenesis, or ga …

heterogenetic antibody
An antibody that reacts to a heterogenetic antigen. ... (05 Mar 2000) ...

heterogenetic antigen
An antigen which is possessed by a variety of different phylogenetically unrelated species; e.g., the various organ-or tissue-specific antigen's, the alpha-and beta-crystalline protein of the lens of the eye, and Forssman antigen. ... Synonym: heterophil antigen. ... (05 Mar 2000) ...

heterogenetic parasite
A parasite whose life cycle involves an alternation of generations. ... (05 Mar 2000) ...

heterogenic
Heterogeneic ... Having different gene constitutions, especially in diverse species. ... (05 Mar 2000) ...

heterogenic enterobacterial antigen
Synonym for common antigen ... Cross reacting antigen (epitope), a common antigen that occurs in 2 or more different molecules/organisms. ... Synonym: heterogenic enterobacterial antigen. ... (05 Mar 2000) ...

heterogenote
In microbial genetics, an organism that contains exogenous genetic material that differs somewhat from the corresponding region of its own original genome, but in a very limited way resembles a heterozygote. ... Origin: hetero-+ genote ... (05 Mar 2000) ...

heterogenous keratoplasty
Corneal transplant with donor material from another species. ... (05 Mar 2000) ...

heterogenous nuclear RNA
<molecular biology> Originally identified as a class of RNA, found in the nucleus but not the nucleolus, which is rapidly labelled and with a very wide range of sizes, 2-40 kilobases. ... It represents the primary transcripts of RNA polymerase II and includes precursors of all messenger RNAs from which introns are removed by splicing. ... (18 N …

heterogenous vaccine
Vaccine that is not autogenous, but is prepared from the same species of bacterium. ... (05 Mar 2000) ...

heteroglycan
Synonym for heteropolysaccharide ... A polysaccharide composed of two or more different types of monosaccharides. ... Compare: glycan, homoglycan. ... Synonym: heteroglycan. ... (05 Mar 2000) ...

heterograft
Synonym for xenograft ... <surgery> A surgical graft of tissue from one species onto or into individuals of unlike species, genus or family. Also know as a heteroplastic graft. ... See: xenotransplantation. ... (11 May 1997) ...

heterohypnosis
Hypnosis induced by or in another, as opposed to autohypnosis. ... (05 Mar 2000) ...

heterokaryon
<cell biology> Cell that contains two or more genetically different nuclei. ... Found naturally in many fungi and produced experimentally by cell fusion techniques, for example hybridoma. ... (18 Nov 1997) ...

heterokaryotic
Exhibiting the properties of a heterokaryon. ... (05 Mar 2000) ...

heterokeratoplasty
Keratoplasty in which the cornea from one species of animal is grafted to the eye of another species. ... (05 Mar 2000) ...

heterokinesia
Executing movements the reverse of those one is told to make. ... Synonym: heterokinesis. ... Origin: hetero-+ G. Kinesis, movement ... (05 Mar 2000) ...

heterokinesis
1. Differential distribution of X and Y chromosomes during meiotic cell division. ... Synonym: heterokinesia. ... Origin: hetero-+ G. Kinesis, movement hetero-+ G. Kinesis, movement ... (05 Mar 2000) ...

heterolactic fermentation
<chemistry> A type of lactic acid fermentation in which sugars (for example lactose, glucose) are fermented to a range of products. ... Compare: homolactic fermentation. ... (09 Oct 1997) ...

heterolalia
The habitual substitution of meaningless or inappropriate words for those intended; a form of aphasia. ... Synonym: heterophasia, heterophemia, heterophemy. ... Origin: hetero-+ G. Lalia, speech ... (05 Mar 2000) ...

heterolateral
Synonym: contralateral. ... Origin: hetero-+ L. Latus, side ... (05 Mar 2000) ...

heterolipids
Lipids containing N and P atoms in addition to the usual C, H, and O. ... Compare: homolipids. ... Synonym: compound lipids. ... (05 Mar 2000) ...

heteroliteral
Relating to stammering or the substitution of one letter for another in the pronunciation of certain words. ... Origin: hetero-+ L. Littera, letter ... (05 Mar 2000) ...

heterologous
<molecular biology> Derived from the tissues or DNA of a different species. ... Compare: autologous, homologous. ... (18 Nov 1997) ...

heterologous antiserum
An antiserum that reacts with (e.g., agglutinates) certain microorganisms or other complexes of antigens, even though the antiserum was produced by means of stimulation with a different microorganism or antigenic material. ... See: homologous antiserum. ... (05 Mar 2000) ...

heterologous desensitization
Stimulation by one agonist which leads to a broad pattern of unresponsiveness to further stimulation by a variety of other agonists. ... (05 Mar 2000) ...

heterologous graft
Synonym for xenograft ... <surgery> A surgical graft of tissue from one species onto or into individuals of unlike species, genus or family. Also know as a heteroplastic graft. ... See: xenotransplantation. ... (11 May 1997) ...

heterologous insemination
Artificial insemination with semen from a donor who is not the woman's husband. ... Synonym: donor insemination. ... Homologous insemination, artificial insemination with the husband's semen. ... (05 Mar 2000) ...

heterologous protein
Synonym for foreign protein ... A protein that differs from any protein normally found in the organism in question. ... Synonym: heterologous protein. ... (05 Mar 2000) ...

heterologous serotype
An antibody that was induced by one antigen and reacts with another antigen. ... (05 Mar 2000) ...

heterologous stimulus
A stimulus that acts upon any part of the sensory apparatus or nerve tract. ... (05 Mar 2000) ...

heterologous tumour
A tumour composed of a tissue unlike that from which it springs. ... (05 Mar 2000) ...

heterologous twins
Synonym for dizygotic twins ... Dizygotic twins are siblings who have shared a common uterine environment. They are due to fertilization of two different ova by different sperm. Dizygotic twins are also called fraternal twins. ... (12 Dec 1998) ...

heterology
1. <biology> The absence of correspondence, or relation, in type of structure; lack of analogy between parts, owing to their being composed of different elements, or of like elements in different proportions; variation in structure from the normal form; opposed to homology. ... 2. <chemistry> The connection or relation of bodies which ha …

heterolysin
A lysin that is formed in one species of animal and manifests lytic activity on the cells of a different species. ... (05 Mar 2000) ...

heterolysis
Dissolution or digestion of cells or protein components from one species by a lytic agent from a different species. ... Origin: hetero-+ G. Lysis, a loosening ... (05 Mar 2000) ...

heterolysosome
<cell biology> Secondary lysosome formed by fusion of a lysosome with another intracellular vesicle. ... Origin: Gr. Soma = body ... (18 Nov 1997) ...

heterolytic
Pertaining to heterolysis or to the effect of a heterolysin. ... (05 Mar 2000) ...

heteromastigote
A flagellate having two flagella, one anterior and one posterior. ... Origin: hetero-+ G. Mastix, a whip ... (05 Mar 2000) ...

heteromeral
Synonym for heteromeric ... 1. Having a different chemical composition. ... 2. Denoting spinal neurons that have processes passing over to the opposite side of the cord. ... Synonym: heteromeral, heteromerous. ... Origin: hetero-+ G. Meros, part ... (05 Mar 2000) ...

heteromeric
1. Having a different chemical composition. ... 2. Denoting spinal neurons that have processes passing over to the opposite side of the cord. ... Synonym: heteromeral, heteromerous. ... Origin: hetero-+ G. Meros, part ... (05 Mar 2000) ...

heteromeric cell
Synonym for commissural cell ... A neuron whose axon passes to the opposite side of the neuraxis. ... Synonym: heteromeric cell. ... (05 Mar 2000) ...

heteromeric peptide
A peptide which, on hydrolysis, yields substances other than amino acids in addition to amino acids; e.g., pteroylglutamic acid. ... (05 Mar 2000) ...

heteromerous
1. <chemistry> Unrelated in chemical composition, though similar or indentical in certain other respects; as, borax and augite are homoemorphous, but heteromerous. ... 2. <botany> With the parts not corresponding in number. ... 3. <ornithology, zoology> Having the femoral artery developed as the principal artery of the leg; said of …

heterometabolous
Pertaining to a member of the Heterometabola, a superorder sometimes used for a series of insect orders in which incomplete metamorphosis is found. ... Origin: hetero-+ G. Metabole, change ... (05 Mar 2000) ...

heterometabolous metamorphosis
Synonym for incomplete metamorphosis ... The development of a nymph into the imago which in many respects resembles the former; characteristic of more primitive insect orders, such as Heteroptera (true bugs), Orthoptera (locusts, grasshoppers), and Blatterria (roaches). ... Synonym: heterometabolous metamorphosis. ... (05 Mar 2000) ...

heterometaplasia
Tissue transformation resulting in production of a tissue foreign to the part where produced. ... (05 Mar 2000) ...

heterometric
Involving or depending upon a change in size. ... Origin: hetero-+ G. Metron, measure ... (05 Mar 2000) ...

heterometropia
A condition in which the refraction is different in the two eyes. ... Origin: hetero-+ G. Metron, measure, + ops, eye ... (05 Mar 2000) ...

heteromorphic
<biology> Deviating from the normal, perfect, or mature form; having different forms at different stages of existence, or in different individuals of the same species; applied especially to insects in which there is a wide difference of form between the larva and the adult, and to plants having more than one form of flower. ... Origin: Hetero- …

heteromorphosis
1. Development of one tissue from a tissue of another kind or type. ... 2. Embryonic development of tissue or an organ inappropriate to its site. ... Origin: hetero-+ G. Morphosis, a molding ... (05 Mar 2000) ...

heteromorphous
<biology> Of two or more distinct forms. ... (09 Oct 1997) ...

heteronereis
<zoology> A free-swimming, dimorphic, sexual form of certain species of Nereis. ... In this state the head and its appendages are changed in form, the eyes become very large; more or less of the parapodia are highly modified by the development of finlike lobes, and branchial lamellae, and their setae become longer and bladelike. ... Origin: NL. …

heteronomous
1. Different from the type; abnormal. ... 2. Subject to the direction or control of another; not self-governing. ... Compare: autonomous. ... Origin: hetero-+ G. Nomos, law ... (05 Mar 2000) ...

heteronomous psychotherapy
Term embracing all forms of psychotherapy that foster the patient's dependence on others, especially dependence on the psychotherapist, in contrast to autonomous psychotherapy. ... (05 Mar 2000) ...

heteronuclear
Denoting a heterokaryon that has lost some of the nuclear material of which the cell line was originally constituted. ... (05 Mar 2000) ...

heteronymous diplopia
crossed diplopia ...

heteronymous hemianopia
Attitudinal hemianopia involving the upper field of one eye and the lower field of the other; or a binasal or bitemporal hemianopia. ... Synonym: crossed hemianopia. ... (05 Mar 2000) ...

heteronymous image
A double image in physiological diplopia, when fixation is directed beyond an object; the right image arises from the left eye, while the left image arises from the right eye; i.e., there is a crossed diplopia. ... (05 Mar 2000) ...

heteronymous parallax
The apparent movement of an object toward the closed eye; noted in exophoria. ... (05 Mar 2000) ...

heteropagus
Unequal conjoined twins in which the imperfectly developed parasite is attached to the ventral portion of the autosite. ... See: conjoined twins. ... See: epigastrius. ... Origin: hetero-+ G. Pagos, fixed ... (05 Mar 2000) ...

heterophagy
Digestion within a cell of an exogenous substance phagocytosed from the cell's environment. ... Origin: hetero-+ G. Phagein, to eat ... (05 Mar 2000) ...