osculate (Verb) — Be intermediate between two taxonomic groups. ex. "These species osculate"
osculate (Verb) — (mathematics) have at least three points in common with. ex. "one curve osculates the other" ex. "these two surfaces osculate"
osculate (Verb) — Touch with the lips or press the lips (against someone's mouth or other body part) as an expression of love, greeting, etc.. ex. "The newly married couple osculated"