Definition of fossula in US English:

fossula

noun

  • 1Anatomy and Zoology. A small depression or cavity, especially on the surface of a structure; a small fossa.

  • 2Zoology and Botany. A shallow groove, especially in the cuticle of an insect or the surface of a pollen grain or spore.

  • 3Palaeontology. In rugose corals: a cavity or groove where one of the primitive septa has failed to develop.

Origin

Mid 18th century. From classical Latin fossula small trench from fossa + -ula, originally after French fossette.

Pronunciation

fossula

/ˈfɒsjʊlə/