operculum
noun
a part or organ serving as a lid or cover, as a covering flap on a seed vessel.
opercula
-
pluralof operculum.plural
The grammatical form denoting more than one person, place, thing, or idea.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The Potamides inhabit the mouths of rivers in warm latitudes, and are distinguishable from the marine Cerithia by their orbicular and multispiral opercula.
From The Student's Elements of Geology by Sir Charles Lyell
These calcareous opercula effervesce with lemon juice, and put themselves in motion in proportion as the carbonic acid is disengaged.
From Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 by Thomasina Ross
They presented a slightly rounded surface, carved in low relief, painted in dull colors, inlaid with opercula and representing, as the name indicated, the dog salmon.
From The Whale House of the Chilkat by George T. Emmons
These are the plate-like swimmerets and opercula of Gigantostraca and Limulus among Arachnids and of Isopod Crustaceans.
From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6 "Armour Plates" to "Arundel, Earls of" by Various
C—Ampullae placed in the sand which is contained in a box, the spouts of which reach from the opercula into ampullae placed under them.
From De Re Metallica, Translated from the First Latin Edition of 1556 by Georgius Agricola
