Definify.com

Webster 1913 Edition

Pectostraca

‖

Pec-tos′tra-ca

(pĕk-tŏs′trȧ-kȧ)

,

p

rop.

Noun.

pl.

[NL., fr. Gr.

πηκτόσ

fixed +

ὄστρακον

shell of a testacean.]

(Zool.)

A degenerate order of Crustacea, including the Rhizocephala and Cirripedia.