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Webster 1913 Edition
Gregarinae
‖
Gregˊa-ri′næ
,p
rop.
Noun.
pl.
(Zool.)
An order of Protozoa, allied to the Rhizopoda, and parasitic in other animals, as in the earthworm, lobster, etc. When adult, they have a small, wormlike body inclosing a nucleus, but without external organs; in one of the young stages, they are amœbiform; – called also
Gregarinida
, and Gregarinaria
.