opisthopulmonate


From The Collaborative International Dictionary of English v.0.48:

Opisthopulmonate \O*pis`tho*pul"mo*nate\, a.[Gr. 'o`pisqen
   behind + E. pulmonate.] (Zool.)
   Having the pulmonary sac situated posteriorly; -- said of
   certain air-breathing Mollusca.
   [1913 Webster]
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