Tracheobranchia \Tra`che*o*bran"chi*a\, n.; pl.
{Tracheobranchlae}. [NL. See {Trachea}, and {Branchia}.]
(Zool.)
One of the gill-like breathing organs of certain aquatic
insect larvae. They contain tracheal tubes somewhat similar
to those of other insects.
[1913 Webster]