Entry 1 sense Webster, 1913 Haustellate /(ha̤s"tĕl*lā̇t [or] ha̤s*tĕl"lā̇t)/ · Haus·tel·late · IPA 01 a. Provided with a haustellum, or sucking proboscis. 1. Provided with a haustellum, or sucking proboscis.(Zool.)