resultant n.

mid-15c., in mathematics, "the total or sum, the sum of an addition or product of a multiplication," from Medieval Latin resultantem (nominative resultans), present participle of resultare "to result" (see result (v.)). Sense in mechanics is from 1815.

"existing or following as a consequence, resulting," 1630s, from resultant (adj.) and from Medieval Latin resultantem (nominative resultans), present participle of resultare "to result" (see result (v.)).