circinal,a.rare. Bot.|ˈsɜːsɪnəl| [f. L. circĭn-us pair of compasses, circle (a. Gr. κίρκῐν-ος, f. κίρκος) a circle + -al1: cf. F. circinal.] = circinate. 1880Gray Struct.Bot. iv. §2. 133 Leaves are..Circinal or Circinate, when coiled from the apex downward.