LOACH
loach
(noun) slender freshwater fishes of Eurasia and Africa resembling catfishes
Source: WordNet® 3.1
Etymology 1
Noun
loach (plural loaches)
A bottom-feeding freshwater fish in the superfamily or suborder Cobitoidea.
Any true loach, of the family Cobitidae.
A similar fish in one of three other families of Cypriniformes: Botiidae, Balitoridae, and Gyrinocheilidae.
Etymology 2
Noun
loach (plural loaches)
(slang) synonym of LOH (light observation helicopter)
Source: Wiktionary
Loach, n. Etym: [OE. loche, F. loche.] (Zoöl.)
Definition: Any one of several small, fresh-water, cyprinoid fishes of the
genera Cobitis, Nemachilus, and allied genera, having six or more
barbules around the mouth. They are found in Europe and Asia. The
common European species (N. barbatulus) is used as a food fish.
Source: Webster’s Unabridged Dictionary 1913 Edition