Entry 1 sense Webster, 1913 Acinetæ /(ăs`ĭ*nē"tē)/ · Ac·i·ne·tæ · IPA 01 n. pl. A group of suctorial Infusoria, which in the adult stage are stationary. See Suctoria. 1. A group of suctorial Infusoria, which in the adult stage are stationary. See Suctoria.(Zool.) See: Suctoria