Gill

1. 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.
2. the vertical plates arranged radially on the underside of mushrooms and many toadstools.
3. the wattles or dewlap of a domestic fowl.

1. gut or clean (a fish).
2. catch (a fish) in a gill net.

Middle English: from Old Norse.

noun

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

Middle English: from Old French gille ‘measure or container for wine’, from late Latin gillo ‘water pot’.

1. a deep ravine, especially a wooded one.
2. a narrow mountain stream.

Middle English: from Old Norse gil ‘deep glen’. The spelling ghyll was introduced by Wordsworth.

1. a female ferret.
2. a young woman.

late Middle English: abbreviation of the given name Gillian .