Definitions:
the paired respiratory organ of fish and some amphibians, by which oxygen is extracted from water flowing over surfaces within or attached to the walls of the pharynx.

the vertical plates arranged radially on the underside of mushrooms and many toadstools.

the wattles or dewlap of a domestic fowl.

gut or clean (a fish).

catch (a fish) in a gill net.

a unit of liquid measure, equal to a quarter of a pint.

a deep ravine, especially a wooded one.

a narrow mountain stream.

a female ferret.

a young woman.