conjugate (kon'ju-gat). 1

In chemistry, consisting of two or more acids, united to form an acid. 2. In botany, paired; having the leaflets disposed in a single pair on the opposite sides, anatomical c. See c. diameter, c. diameter. The anteroposterior diameter of the superior strait of the pelvis. Also called c. vera. c. focus. The focus of an object lying farther away than the principal focus of a lens, but not so far as to give parallel rays. The c. focus and the object are interchangeable in the sense that if the object is placed at the conjugate focus, its focus will then be found where the object was formerly situated, c. vera. See c. diameter. diagonal c The distance between the promontory of the sacrum and the lower border of the symphysis pubis, external c. The distance between the posterior surface of the upper part of the sacrum and the anterior surface of the symphysis pubis with the overlying soft parts, as measured by the pelvimeter. Also called diameter, oblique c. SeeBaudelocque's diagonal c. obstetrical c. The distance from the promontory of the sacrum to a point on the posterior border of the symphysis pubis, a few mm. from its upper margin. true c. The distance between the promontory of the sacrum and the pubic symphysis. [Lat., conjugata, from con, with, -fjugum, yoke.]