'Leptostraca' definitions:

Definition of 'Leptostraca'

From: GCIDE

Leptostraca \Lep*tos"tra*ca\ (l[e^]p*t[o^]s"tr[.a]*k[.a]), n. pl. [NL., fr. Gr. lepto`s thin, slender + 'o`strakon shell of a testacean.] (Zool.) An order of Crustacea, including Nebalia and allied forms. [1913 Webster]