Entry 1 sense Webster, 1913 Gymnoblastea /(jĭm`nō̇*blăs"tē̇*ȧ)/ · Gym·no·blas·te·a · IPA 01 n. pl. The Athecata; -- so called because the medusoid buds are not inclosed in a capsule. 1. The Athecata; -- so called because the medusoid buds are not inclosed in a capsule.(Zool.)