( n. )
One of the gill-like breathing organs of certain aquatic insect larvae. They contain tracheal tubes somewhat similar to those of other insects.
( n. )
One of the gill-like breathing organs of certain aquatic insect larvae. They contain tracheal tubes somewhat similar to those of other insects.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012