Definition
operculums
noun
- A lid-like or flap-like anatomical structure that covers or closes an opening, especially in fish and mollusks.
Usage: plural of operculum; biology/zoology term; commonly refers to the gill cover in fish
Examples
- Fish use their operculums to protect their gills from damage.
- The operculums of different fish species vary greatly in shape and size.
- When the fish opens its mouth, the operculums flare outward to increase water flow.
- Marine biologists examined the operculums to identify the species.
- The operculums close tightly when the fish is resting.