1. A reference to something that is congenitally united or grown together: The adnate parts of flowers include stamens or the pollen-producing organs of flowers that are attached to petals or the modified leaves that surround the reproducing parts of flowers.
2. Concerning the union or cohesion of parts not normally joined together: When there is an adnate organ, it is considered to be of a different kind and not a usual one.
3. Etymology: from Latin agnatus, from agnasci, "to become"; from ad, " to" + nasci, "to be born".