| labioscrotal folds | Lateral fold's at either side of the embryonic cloacal membrane that develop into either the scrotum or the labia majora. (05 Mar 2000) |
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| folds of iris | Numerous very fine, almost microscopic, radial folds on the posterior surface of the iris that extend around the pupillary margin. Synonym: plicae iridis. (05 Mar 2000) |
| lateral folds | Ventral foldings of the lateral margins of the embryonic disk, the development of which establishes the definitive embryonic body form. (05 Mar 2000) |