Look up: operculum

1. operculum
   The bony covering of the gill chamber; the gill cover.
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
2. operculum
   A flap or lid-like covering over the opening of an ascus or sporangium. (Pl. opercula.)
   Found on http://ppathw3.cals.cornell.edu/glossary
   
   
3. Operculum
   a bony gill cover.
   Found on http://www.coralrealm.com/viewpage.html?
   
   
4. Operculum
   The lid or cover-like specialisation of a parasite eggshell through which the larva escapes.
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
5. operculum
   [n] - a hard flap serving as a cover for (a) the gill slits in fishes or (b) the opening of the shell in certain gastropods when the body is retracted
   Found on http://www.webdictionary.co.uk/definitio
   
   
6. 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 c...
   Found on http://www.encyclo.co.uk/webster/O/23
   
   
7. operculum
   A lid or cover becoming detached at maturity by abscission, in Eucalyptus (for example), a cap covering the bud and formed by fusion or cohesion of perianth parts. ... (09 Oct 1997) ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
8. operculum
   noun a hard flap serving as a cover for (a) the gill slits in fishes or (b) the opening of the shell in certain gastropods when the body is retracted
   Found on http://wordnetweb.princeton.edu/perl/web
   
   
9. operculum
   (o-pur´ku-lәm) Latin word meaning lid or covering. the folds of pallium from the frontal, parietal, and temporal lobes of the cerebrum overlying the insula. adj., oper´cular., adj. dental operculum the hood of gingival tissue overlying the crown of an erupting...
   Found on http://www.encyclo.co.uk/local/21001
   
   
10. Operculum
    • (n.) The lid of the urnlike capsule of mosses. • (n.) The lid of a pitcherform leaf. • (n.) The lid closing the aperture of various species of shells, as the common whelk. See Illust. of Gastropoda. • (n.) Any lidlike or operculiform process or part; as, the opercula of a denta...
    Found on http://thinkexist.com/dictionary/meaning
    
    
11. operculum
    (from the article `bryophyte`) The moss sporangium usually opens by way of an apical lid (the operculum). When the operculum falls, there is exposed a ring of teeth that controls ... ...and often with thickened midrib; cells usually lacking corner thickenings; oil bodies, if present, not complex; jacket of sporangium often with ... [...
    Found on http://www.britannica.com/eb/a-z/o/23
    
    
12. operculum
    (from the article `amphibian`) ...can receive external stimuli. Also unique to amphibians is the columella-opercular complex, a pair of elements associated with the auditory ... Zooid polymorphism exists among the cheilostome colonies, and the operculum seems to have been significant in the evolution of the specialized zooids ... The...
    Found on http://www.britannica.com/eb/a-z/o/23
    
    
13. Operculum
    A small plug of mucus that seals the cervix to protect your baby from infection. During pregnancy, secretions will accumulate and form a mucus plug at the opening of your cervix to protect against infection. The mucus plug will remain at the top of the cervix until just before labor begins. As labor...
    Found on http://www.pregnology.com/AZ/O/2
    
    
14. Operculum
    In zoology, an operculum is a lid or flap of skin covering an aperture, such as the gill slit cover of fish and larval amphibians and the horny calcareous operculum secreted by many gastropod molluscs, which closes the opening of the shell when the animal is inside. In botany an operculum is the con...
    Found on http://www.probertencyclopaedia.com/brow
    
    
15. operculum
    Type: Term Pronunciation: ō-per′kyū-lŭm, -lī, -lă Definitions: 1. Anything resembling a lid or cover. 2. In anatomy, the portions of the frontal (operculum frontale [TA], frontal operculum [TA]), parietal (operculum parietale [TA], parietal operculum [TA]), and tempora...
    Found on http://www.medilexicon.com/medicaldictio
    
    
16. Operculum
    Gill cover
    Found on http://www.oceanoasis.org/fieldguide/glo
    
    
17. operculum
    Latin = lid or cover; hence, operculum insulae, the cerebral cortex covering and hiding the insula (the 5th lobe of cerebral cortex).
    Found on http://www.anatomy.usyd.edu.au/glossary/
    
    
18. Operculum
    fleshy partial covering over nostril
    Found on http://www.pugetsound.edu/academics/acad
    
    
19. Operculum
    (brain) `Operculum`, derived from Latin, meaning "little lid", refers to the cerebral cortex on the outside surface of the brain bordering the lateral sulcus, and the roof and floor of the lateral sulcus. (The back wall of the lateral sulcus is the insula.) Neuroscience divides the ...
    Found on http://en.wikipedia.org/wiki/Operculum
    
    
20. Operculum
    (gastropod) of the freshwater snail Viviparus contectus with corneous operculum in place The `operculum`, meaning little lid, (plural: opercula or operculums) is a corneous or calcareous anatomical structure which exists in many (but not all) groups of sea snails and freshwater snails,...
    Found on http://en.wikipedia.org/wiki/Operculum
    
    
21. Operculum
    (fish) The `operculum` of a bony fish is the hard bony flap covering and protecting the gills. In most fish, the rear edge of the operculum roughly marks the division between the head and the body. The operculum is composed of four fused bones; the opercle, preopercle, interopercle, and subop...
    Found on http://en.wikipedia.org/wiki/Operculum
    
    
22. Operculum
    (botany) An `operculum`, in botany, is a term generally used to describe a structure within a plant, moss, or fungus acting as a cap, flap, or lid. In plants, it may also be called a `bud cap`. Examples of structures identified as opercula include: See also:
    Found on http://en.wikipedia.org/wiki/Operculum
    
    
23. Operculum
    (bryozoa) In the bryozoan order Cheilostomata, the `operculum` is a calcareous or chitinous lid-like structure that protects the opening through which the polypide protrudes. Many species have modified the operculum in specialized zooids (avicularia) to form a range of mandibles (probably for...
    Found on http://en.wikipedia.org/wiki/Operculum
    
    
24. Operculum
    (animal) `` retracted into the shell, with the operculum closing the aperture An `operculum (animal)` is an anatomical feature, a stiff structure resembling a lid or a small door that opens and closes, and thus controls contact between the outside world and an internal part of an animal. Exam...
    Found on http://en.wikipedia.org/wiki/Operculum