semidouble Meaning, Definition & Usage

Sem"i*dou`ble noun
Definitions
  1. (Eccl.) An office or feast celebrated with less solemnity than the double ones. See Double, n., 8.
Sem`i*dou"ble adjective
Definitions
  1. (Bot.) Having the outermost stamens converted into petals, while the inner ones remain perfect; -- said of a flower.

Webster 1913