a. [f. L. cooptāt- ppl. stem (see COOPT) + -IVE.] Of, pertaining to, or chosen by cooptation.
1874. Scheme of Wilton Grammar School. The governing body shall consist of twelve persons, of whom five shall be representative Governors, and seven shall be co-optative Governors.
1884. Manch. Exam., 10 May, 5/6. The governing body consists of 12 representative governors and 12 co-optative governors.