SEX

I. noun Etymology: Middle English, from Latin ~us Date: 14th century either of the two major forms of individuals that occur in many species and that are distinguished respectively as female or male especially on the basis of their reproductive organs and structures, the sum of the structural, functional, and behavioral characteristics of organisms that are involved in reproduction marked by the union of gametes and that distinguish males and females, 3. ~ually motivated phenomena or behavior, ~ual intercourse , genitalia , II. transitive verb Date: 1884 to identify the ~ of , 2. to increase the ~ual appeal of, to arouse the ~ual desires of