Definitions

Gills, usually thoracic. [Poore, 2004]
Respiratory organ (gill) associated with an appendage or with the body wall.
(pl. branchiae) [Perez Farfante and Kensley, 1997]
Thin-walled finger-like or leaf-like structure extending outward from limb or secondarily from side of body, functioning for respiration.
(syn. gill. [Special types are termed arthrobranchs, pleurobranchs, and podobranchs, depending on their pl) [Moore and McCormick, 1969]
Thin-walled, fingerlike or leaflike structure extending outward from appendage or secondarily from side of body, functioning in respiration.
(pl. branchiae) (syn. gill) [McLaughlin, 1980]
(Taxon-specific: Order Decapoda) Gill. [Stachowitsch, 1992]
(Taxon-specific: Order Amphipoda) Coxal gill. [Stachowitsch, 1992]
(Taxon-specific: Order Isopoda) Respiratory structure on or modification (thin cuticle, folding, etc.) of pleopod for gas exchange. [Stachowitsch, 1992]
(Taxon-specific: Order Mysida) Gill. [Stachowitsch, 1992]
(Taxon-specific: Order Stomatopoda) Gill. [Stachowitsch, 1992]
(Taxon-specific: Class Ostracoda) Branchial plate, gill. [Stachowitsch, 1992]