different between operculum vs columella

English

Etymology

Borrowed from Latin operculum.

Noun

operculum (plural opercula)

1. (zoology) A covering flap in animals, such as a gill cover.
   • 2017, Susannah Lydon, The Guardian, 18 January:

     Hyoliths […] have a small, conical calcium carbonate shell, with a lid called an operculum.

2. (botany) The lidlike portion of a moss sporangium or of a fruit that detaches to allow the dispersal of spores or seeds.
3. (dentistry) A gum flap covering (part of) a partially erupted tooth, usually a wisdom tooth.
4. A structure which serves as a cover or lid.
   • 1901, H. G. Wells, The First Men in the Moon, chapter IX, page 95

     I lifted the circular operculum from its place and laid it carefully on the bale.

5. This term needs a definition. Please help out and add a definition, then remove the text {{rfdef}}.

Related terms

• opercle

Derived terms

• operculitis
• preoperculum
• interoperculum
• suboperculum

Translations

Latin

Etymology

From operi? (“I close”) +? -culum.

Pronunciation

• (Classical) IPA^(key): /o?per.ku.lum/, [??p?rk??????]
• (Ecclesiastical) IPA^(key): /o?per.ku.lum/, [??p?rkulum]

Noun

operculum n (genitive opercul?); second declension

1. cover, covering

Declension

Second-declension noun (neuter).

Descendants

• ? English: opercle, operculum
• ? French: opercule
• ? Italian: opercolo
• ? Portuguese: opérculo
• ? Spanish: opérculo

References

• operculum in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• operculum in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• operculum in Gaffiot, Félix (1934) Dictionnaire illustré Latin-Français, Hachette
• operculum in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers

English

Etymology

From Latin columella (“small column”).

Pronunciation

• Rhymes: -?l?

Noun

columella (plural columellas or columellae)

1. (biology) Any of various small structures in plants or animals that are columnar in shape.
2. (anatomy) The skin at the end of the septum which separates the nostrils.
3. (comparative anatomy) In birds, reptiles, and amphibians, the small bone which carries vibration from the tympanum to the inner ear.
4. (malacology) In gastropods, the structure at the center of the whorls of the shell.
5. (coral science) The structure at the center of the calyx where the septa join together.
6. (mycology) The central sterile portion of the sporangium in various fungi.
7. (palynology) A rod-shaped reinforcing element of the sexine layer of a pollen grain.

Derived terms

• columellar
• columellate
• columelloid

Translations

See also

• columella on Wikipedia.Wikipedia

References

• “columella”, in The American Heritage Dictionary of the English Language, 4th edition, Boston, Mass.: Houghton Mifflin, 2000, ?ISBN

Italian

Etymology

From Latin columella.

Noun

columella f (plural columelle)

1. (biology, anatomy, zoology) columella, modiolus
2. (anatomy) stapes, stirrup bone, stirrup

Synonyms

• (columella bone): modiolo
• (stirrup bone): staffa

Latin

Alternative forms

• columnella

Etymology

From columna +? -ellus.

Pronunciation

• (Classical) IPA^(key): /ko.lu?mel.la/, [k?????m?l??ä]
• (Ecclesiastical) IPA^(key): /ko.lu?mel.la/, [k?lu?m?l??]

Noun

columella f (genitive columellae); first declension

1. Diminutive of columna: a small column or pillar

Declension

First-declension noun.

Descendants

• English: columella
• French: coulemelle
• Italian: columella
• Portuguese: columela
• Translingual: Columella

References

• columella in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• columella in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• columella in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
• columella in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
• columella in Ramminger, Johann (accessed 16 July 2016) Neulateinische Wortliste: Ein Wörterbuch des Lateinischen von Petrarca bis 1700?^[1], pre-publication website, 2005-2016