noun, plural os·cu·la [os-kyuh-luh] /ˈɒs kyə lə/.
Origin of osculum
Examples from the Web for oscula
Oscula circular or star-shaped, usually surrounded by radiating furrows; pores normally contained in single cells.
The oscula are large and ragged on the edges; the shape is irregular.The Sea-beach at Ebb-tide|Augusta Foote Arnold
Oscula numerous but minute and inconspicuous, never star-shaped.
External membrane closely adherent to the sponge except immediately round the oscula.
The external membrane in many Spongillid is prolonged round and above the oscula so as to form an oscular collar.