1. To kiss together, to touch: When Jack picked up his wife at the train station after she arrived, they interosculated and talked together softly.
2. To form a connecting link, as between objects, genera, etc: Certain organisms or species interosculate in that they share specific characteristics.
3. Etymology: from Latin osculat-, "kissed"; from the verb osculari, from osculum, "little mouth" or "kiss".