a. and sb. Zool. [f. mod.L. Aporobranchia (f. Gr. ἀ priv. + πόρο-ς passage, pore + βράγχι-α gills) + -AN.] A. adj. Having no apparent respiratory tubes. B. sb. Arachnids or Spiders so distinguished, otherwise called Podosomata.
1835. Kirby, Hab. & Inst. Anim., II. xix. 282. These [parasites] from their having no apparent respiratory apparatus, he [Latreille] named Aporobranchians.
