Available Definitions:
1) a. - Later in time; hence, later in the order of proceeding or moving; coming after; -- opposed to prior.
2) a. - Situated behind; hinder; -- opposed to anterior.
3) a. - At or toward the caudal extremity; caudal; -- in human anatomy often used for dorsal.
4) a. - On the side next the axis of inflorescence; -- said of an axillary flower.