heterocyst
Het"er*o*cyst, n. Etym: [Hetero- + cyst.] (Bot.) Defn: A cell larger than the others, and of different appearance, occurring in certain algæ related to nostoc.
Het"er*o*cyst, n. Etym: [Hetero- + cyst.] (Bot.) Defn: A cell larger than the others, and of different appearance, occurring in certain algæ related to nostoc.