a.[Z]

1. 性的，性别的
2. 两性的；关于性关系的；性欲的
   The disease is passed on by sexual contact.

   该病通过性交传染。

3. 【生】有性的；有性繁殖的

adj.

1. relating to the instincts, physiological processes, and activities connected with physical attraction or intimate physical contact between individuals.
2. relating to the two sexes or to gender.
3. Biology  (of reproduction) involving the fusion of gametes.
   ▸being of one sex or the other; capable of sexual reproduction.