1.NounA religious tablet, usually carrying a representation of Christ or the Virgin Mary, which is kissed by the priest during the Mass ("kiss of peace"); it is then passed to others at the mass who also kiss it.
2.AdjectiveOf or relating to kissing.
3.AdjectiveRelating to, or having the properties of, an osculatrix; capable of osculation.
"A circle may be osculatory with a curve, at a given point."