<p><strong>Noun</strong></p><ul><li>a cyst with watery contents that is produced in humans and animals by a tapeworm in the larval state; cysticerus.</li><li>a cystic vestige of an embryonic feature.</li></ul><p><strong>Adjective</strong></p><ul><li>Also hydatidous: of or relating to a hydatid.</li><li>containing or affected by hydatids.</li></ul>