Co- - definition of co- by The Free Dictionary
https://www.thefreedictionary.com/co-
var. of com-before a vowel, h, and gn: coalesce; cohere; cognate. The prefix co-, with the sense “joint, jointly,” now forms new words from bases beginning with any sound (cochair; cogeneration; costar; coworker), sometimes with the derived sense “auxiliary” (coenzyme; copilot), and, in mathematics and astronomy, with the sense “complement” (codeclination).
DA: 34 PA: 6 MOZ Rank: 71
