(teratology) A rare congenital deformity in which the legs are fused together, giving them the appearance of a mermaid's tail.

Synonym of siren song

plural of sirenid

(zoology) Any member of the family Sirenidae of salamanders.

plural of siredon

(zoology, obsolete) A larval or neotenic salamander (e.g. the axolotl, Ambystoma mexicanum).

plural of air raid siren

Without a siren.

Alternative spelling of sire-land

plural of sireland