Akademik

knee pants
noun
trousers ending above the knee
Syn: ↑breeches, ↑knee breeches, ↑knickerbockers, ↑knickers
Usage Domain: ↑plural, ↑plural form
Hypernyms: ↑trouser, ↑pant
Hyponyms: ↑britches, ↑buckskins, ↑plus fours, ↑trunk hose
Part Meronyms: ↑codpiece

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knee-length pants, esp. those formerly worn by boys considered too young to wear full-length trousers (often used as a term symbolizing youth): I haven't felt this way since I was in knee pants.
[1865-70]

Useful english dictionary. 2012.