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Webster 1913 Edition

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Noun.

pl.

[NL., from Gr.

ἀ

priv. + [GREEK], pl., the gills of fishes.]

(Zool.)

A group of annelids, so called because the species composing it have no special organs of respiration.

See also: abranchiata

Abranchiata

(archaic) An obsolete order of annelids, so called because the species composing it have no special organs of respiration.
(archaic) Any of a number of gill-less animals excluding Abranchia.

See also: Abranchiata

abranchiata ‎(uncountable)

(zoology) An obsolete order of annelids, so called because the species composing it have no special organs of respiration.
Any of a number of gill-less animals excluding Abranchia.