Bot. [f. SYN- + ANTHESIS.] Simultaneous ripening of the stamens and pistils in a flower; hence Synanthetic a., exhibiting synanthesis. So Synanthic a. [Gr. ἄνθος flower], characterized by synanthy; Synanthious a., of leaves, expanding at the same time as the flowers (cf. synanthous); Synanthous a. (a) applied to plants whose leaves expand at the same time as the flowers; (b) = synanthic; Synanthy, abnormal union or fusion of two or more flowers.
1880. Gray, Struct. Bot., vi. § 4 (ed. 6), 219. *Synanthesis, the maturing of the anthers and stigmas simultaneously or nearly so.
1909. Cent. Dict., Suppl., *Synanthetic.
1869. M. T. Masters, Veget. Teratol., 37. *Synanthic flowers of Campanula medium.
1845. Lindley, Sch. Bot., viii. (1858), 135. Leaves … *synanthious (i. e. appearing with the flowers). Ibid. (1832), Introd. Bot., 401. *Synanthous; when flowers and leaves appear at the same time.
1869. M. T. Masters, Veget. Teratol., 37. *Synanthy may take place without much derangement of the structure of either flower.
