Definitions

Light-producing organ of euphausiids. Those on the thorax and abdomen have lenticular lenses that can direct the blue-green light emissions. [Mauchline, 1984]
Luminescent integumental organ, sometimes with lens. [Poore, 2004]
Luminescent organ of the integument [Perez Farfante and Kensley, 1997]
Luminous organ generally located on eyestalk, limbs or abdomen of various crustaceans. [Moore and McCormick, 1969]
Luminous organ. [McLaughlin, 1980]
Specialized organ in some shrimps, capable of producing light, with or without lens. [Butler, T. H.]
(Taxon-specific: Order Decapoda) Luminous organ; typically consisting of lens and reflector and variously distributed in and on body. [Stachowitsch, 1992]
(Taxon-specific: Order Mysida) In certain mysidaceans, bioluminescent gland emptying into reservoir which in turn opens near base of exopod of maxilla.
(syn. luminescent organ) [Stachowitsch, 1992]
(Taxon-specific: Order Euphausiacea) One of numerous light-producing organs. Located at upper end of eyestalks (ocular peduncles), in coxae of second and eighth (often also third through sixth) thoracopods, and in middle of ventral surface (sternite) of first four abdominal somites.
(syn. light organ, luminescent organ) [Stachowitsch, 1992]