The Collaborative International Dictionary of English v.0.48:

Tracheate \Tra"che*ate\, a. (Zool.)
   Breathing by means of tracheae; of or pertaining to the
   Tracheata.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tracheate \Tra"che*ate\, n. (Zool.)
   Any arthropod having tracheae; one of the Tracheata.
   [1913 Webster]