Operatively Op"er·a·tive·ly adverb In an operative manner.
Operator Op"er·a`tor noun [ Latin ]
1. One who, or that which, operates or produces an effect. 2. (Surg.) One who performs some act upon the human body by means of the hand, or with instruments. 3. A dealer in stocks or any commodity for speculative purposes; a speculator. [ Brokers' Cant]
4. (Math.) The symbol that expresses the operation to be performed; -- called also facient .
Operatory Op"er·a·to·ry noun A laboratory. [ Obsolete]
Opercle O"per·cle noun [ Confer F.
opercule . See
Operculum .]
1. (Anat.) Any one of the bony plates which support the gill covers of fishes; an opercular bone. 2. (Zoology) An operculum.
Opercula O·per"cu·la noun plural See Operculum .
Opercular O·per"cu·lar adjective Of, pertaining to, or like, an operculum.
Opercular O·per"cu·lar noun (Anat.) The principal opercular bone or operculum of fishes.
Operculate, Operculated O·per"cu·late, O·per"cu·la`ted adjective [ Latin
operculatus , past participle of
operculare to furnish with a lid, from
operculum lid.]
1. (Botany) Closed by a lid or cover, as the capsules of the mosses. 2. (Zoology) Having an operculum, or an apparatus for protecting the gills; -- said of shells and of fishes.
Operculiferous O·per`cu·lif"er·ous adjective [
Operculum +
-ferous .]
(Zoology) Bearing an operculum.
Operculiform O·per"cu·li·form adjective [ Latin
operculum a cover +
-form : confer French
operculiforme .]
Having the form of a lid or cover.
Operculigenous O·per`cu·lig`e·nous adjective [
Operculum +
-genous .]
(Zoology) Producing an operculum; -- said of the foot, or part of the foot, of certain mollusks.
Operculum O·per"cu·lum noun ;
plural Latin
Opercula , English
Operculums . [ Latin , a cover or lid, from
operire to cover.]
1. (Botany) (a) The lid of a pitcherform leaf. (b) The lid of the urnlike capsule of mosses. 2. (Anat.) (a) Any lidlike or operculiform process or part; as, the opercula of a dental follicle. (b) The fold of integument, usually supported by bony plates, which protects the gills of most fishes and some amphibians; the gill cover; the gill lid. (c) The principal opercular bone in the upper and posterior part of the gill cover. 3. (Zoology) (a) The lid closing the aperture of various species of shells, as the common whelk. See Illust. of Gastropoda . (b) Any lid-shaped structure closing the aperture of a tube or shell.
Operetta Op`er·et"ta noun [ Italian , dim. of
opera .]
(Mus.) A short, light, musical drama.
Operose Op"er·ose` adjective [ Latin
operosus , from
opera pains, labor,
opus ,
operis , work, labor.]
Wrought with labor; requiring labor; hence, tedious; wearisome. "
Operose proceeding."
Burke. "A very
operose calculation."
De Quincey. --
Op"er*ose`ly ,
adverb --
Op"er*ose`ness ,
noun
Operosity Op`er·os"i·ty noun [ Latin
operositas .]
Laboriousness. [ R.]
Bp. Hall.
Operous Op"er·ous adjective Operose. [ Obsolete]
Holder. --
Op"er*ous*ly ,
adverb [ Obsolete]
Opertaneous Op`er·ta"ne·ous adjective [ Latin
opertaneus ;
operire to hide.]
Concealed; private. [ R.]
Opetide Ope"tide` noun [
Ope +
tide .]
Open time; -- applied to different things :
(a) The early spring, or the time when flowers begin opening. [ Archaic]
Nares. (b) The time between Epiphany and Ash Wednesday wherein marriages were formerly solemnized publicly in churches. [ Eng.] (c) The time after harvest when the common fields are open to all kinds of stock. [ Prov.Eng.]
Halliwell. [ Written also
opentide .]
Ophelic O·phel"ic adjective (Chemistry) Of, pertaining to, or designating, a substance (called ophelic acid ) extracted from a plant ( Ophelia ) of the Gentian family as a bitter yellowish sirup, used in India as a febrifuge and tonic.
Ophicleide Oph"i·cleide noun [ French
ophicléide , from Greek
'o`fis a serpent + ..., gen. ..., a key. So named because it was in effect the serpent, an old musical instrument, with keys added.]
(Mus.) A large brass wind instrument, formerly used in the orchestra and in military bands, having a loud tone, deep pitch, and a compass of three octaves; -- now generally supplanted by bass and contrabass tubas. Moore (Encyc. of Music).
Ophidia O·phid"i·a noun plural [ New Latin , from Greek ..., dim. of
'o`fis a snake.]
(Zoology) The order of reptiles which includes the serpents. » The most important divisions are: the
Solenoglypha , having erectile perforated fangs, as the rattlesnake; the
Proteroglypha , or elapine serpents, having permanently erect fang, as the cobra; the
Asinea , or colubrine serpents, which are destitute of fangs; and the
Opoterodonta , or
Epanodonta , blindworms, in which the mouth is not dilatable.
Ophidian O·phid"i·an noun [ Confer French
ophidien .]
(Zoology) One of the Ophidia; a snake or serpent.
Ophidian O·phid"i·an adjective [ Confer French
ophidien .]
(Zoology) Of or pertaining to the Ophidia; belonging to serpents.
Ophidioid O·phid"i·oid adjective [
Ophidion +
-oid .]
(Zoology) Of or pertaining to the Ophidiidæ , a family of fishes which includes many slender species. --
noun One of the Ophidiidæ .
Ophidion O·phid"i·on noun ;
plural Ophidia . [ Latin , from Greek ... little snake, from
'o`fis a serpent.]
(Zoology) The typical genus of ophidioid fishes. [ Written also Ophidium .] See Illust. under Ophidioid .
Ophidious O·phid"i·ous adjective Ophidian.
Ophiolatry O`phi·ol"a·try noun [ Greek
'o`fis serpent + ... worship.]
The worship of serpents.
Ophiologic, Ophiological O`phi·o·log"ic, O`phi·o·log"ic·al adjective Of or pertaining to ophiology.
Ophiologist O`phi·ol"o·gist noun One versed in the natural history of serpents.
Ophiology O`phi·ol"o·gy noun [ Greek
'o`fis a serpent +
-logy : confer French
ophioloqie .]
That part of natural history which treats of the ophidians, or serpents.
Ophiomancy O"phi·o·man`cy noun [ Greek
'o`fis a serpent +
-mancy : confer French
ophiomantie .]
Divination by serpents, as by their manner of eating, or by their coils.
Ophiomorpha O`phi·o·mor"pha noun plural [ New Latin See
Ophiomorphous .]
(Zoology) An order of tailless amphibians having a slender, wormlike body with regular annulations, and usually with minute scales imbedded in the skin. The limbs are rudimentary or wanting. It includes the cæcilians. Called also Gymnophiona and Ophidobatrachia .
Ophiomorphite O`phi·o·mor"phite noun [ Greek
'o`fis a serpent + ... form.]
(Paleon.) An ammonite.
Ophiomorphous O`phi·o·mor"phous adjective [ Greek
'o`fis a serpent +
-morphous .]
Having the form of a serpent.
Ophiophagous O`phi·oph"a·gous adjective [ Greek
'o`fis a serpent +
fagei^n to eat: confer French
ophiophage .]
(Zoology) Feeding on serpents; -- said of certain birds and reptiles.
Ophiophagus O`phi·oph"a·gus noun [ New Latin See
Ophiophagous .]
(Zoology) A genus of venomous East Indian snakes, which feed on other snakes. Ophiophagus elaps is said to be the largest and most deadly of poisonous snakes.
Ophism Oph"ism noun 1. Doctrines and rites of the Ophites. 2. Serpent worship or the use of serpents as magical agencies.
Ophite O"phite adjective [ Greek
'ofi`ths , from
'o`fis a serpent.]
Of or pertaining to a serpent. [ Obsolete]
Ophite O"phite noun [ Latin
ophites , Greek
'ofi`ths (sc. ...), a kind of marble spotted like a serpent: confer French
ophite .]
(Min.) A greenish spotted porphyry, being a diabase whose pyroxene has been altered to uralite; -- first found in the Pyreness. So called from the colored spots which give it a mottled appearance. --
O*phi"ic adjective
Ophite O"phite noun [ Latin
Ophitae , plural See
Ophite ,
adjective ]
(Eccl.Hist.) A mamber of a Gnostic serpent-worshiping sect of the second century.
Ophiuchus O`phi·u"chus noun [ Latin , from Greek ..., lit., holding a serpent;
'o`fis a serpent + ... to hold.]
(Astron.) A constellation in the Northern Hemisphere, delineated as a man holding a serpent in his hands; -- called also Serpentarius .
Ophiura O`phi·u"ra noun [ New Latin , from Greek ... snake + ... a tail.]
(Zoology) A genus of ophiurioid starfishes.
Ophiuran O`phi·u"ran adjective (Zoology) Of or pertaining to the Ophiurioidea. --
noun One of the Ophiurioidea.
Ophiurid O`phi·u"rid noun (Zoology) Same as Ophiurioid .
Ophiurida O`phi·u"ri·da noun plural [ New Latin ]
(Zoology) Same as Ophiurioidea .
Ophiurioid O`phi·u"ri·oid adjective (Zoology) Of or pertaining to the Ophiurioidea. --
noun One of the Ophiurioidea. [ Written also
ophiuroid .]
Ophiurioidea O`phi·u`ri·oi"de·a O`phi*u*roi"de*a noun plural [ New Latin , from Greek ... serpent + ... tail + ... form.] (Zoology) A class of star-shaped echinoderms having a disklike body, with slender, articulated arms, which are not grooved beneath and are often very fragile; -- called also Ophiuroida and Ophiuridea . See Illust. under Brittle star .
Ophryon Oph"ry·on noun [ New Latin , from Greek ..., ..., the brow.]
(Anat.) The supraorbital point.
Ophthalmia Oph·thal"mi·a (ŏf*thăl"mĭ*ȧ)
noun [ French
ophthalmie , Latin
ophthalmia , from Greek
'ofqalmi`a , from
'ofqalmo`s the eye, akin to English
optic . See
Optic .]
(Medicine) An inflammation of the membranes or coats of the eye or of the eyeball.
Ophthalmic Oph·thal"mic (ŏf*thăl"mĭk; 277)
adjective [ Greek
'ofqalmiko`s : confer French
ophthalmique . See
Ophthalmia .]
(Anat.) Of, pertaining to, or in the region of, the eye; ocular; as the ophthalmic , or orbitonasal, nerve, a division of the trigeminal, which gives branches to the lachrymal gland, eyelids, nose, and forehead. Ophthalmic region (Zoology) ,
the space around the eyes.
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