the world > plants > part of plant > (defined by) distribution, arrangement, or position > [adjective] > in verticil or whorl (of arrangement) > arranged in verticil or whorl > arranged in number of whorls (3)
Botany. Of a perianth, calyx, etc., or members of a series of floral organs: composed of or arranged in two whorls. Cf. monocyclic, adj. 3.
Botany. Having a group of structures (e.g. vascular bundles, members of a series of floral organs, etc.) arranged in a single whorl or ring.
Botany. Arranged in three whorls.