Entry 1 sense Webster, 1913 Cypsela /(s?p"s?-l?)/ · Cyp·se·la · IPA /ˈsɪpsələ/ 01 n. A one-seeded, one-celled, indehiscent fruit; an achene with the calyx tube adherent. 1. A one-seeded, one-celled, indehiscent fruit; an achene with the calyx tube adherent.(Bot.)