oscula-

(Latin: kiss; from "little mouth"; lip [diminutive of os-, "mouth"])

oscule (s) (noun), oscules (pl)
The mouthlike opening of a sea sponge which is used to expel water; osculum: Jenny's father showed her a sea sponge with an oscule to ejecte water.
osculum (s) (noun), oscula (pl)
1. An opening like a mouth, through which a sponge expels water: In her biology class, Ivy watched a documentary film showing a sponge ejecting water from its osculum
2. A minute opening: An osculum can be a little orifice.

Other "kissing" words: philema-.