Sac

sak, n. ( bot. , zool. ) a sack or bag for a liquid.— adjs. Sac′cāte , -d , pouched: pouch-like; Sac′cular , like a sac, sacciform; Sac′culate , -d , formed in a series of sac-like expansions: encysted.— ns. Sacculā′tion , the formation of a sac: a series of sacs; Sac′cule , Sac′culus , a small sac:— pl. Sac′culi . [Fr.,—L. saccus , a bag.]