calypter
noun
ca·lyp·ter
kəˈliptə(r),
ˈkalə̇p-
plural calypters
-ə(r)z
or calypteres ˌkalə̇pˈti(ə)(ˌ)rēz
1
: the alula of a two-winged fly especially when large enough to cover the halter
2
: calyptra
Word History
Etymology
New Latin, from Greek kalyptēr sheath, from kalyptein to cover, conceal