| sexual neurasthenia | A form in which sexual erethism, weakness, or perversion is a marked symptom. (05 Mar 2000) |
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| sexual partners | Married or single individuals who share sexual relations. (12 Dec 1998) |
| sexual perversion | A sexual practice that is biologically atypical, considered morally wrong, or legally prohibited. See: bestiality, pedophilia. Synonym: sexual perversion. (05 Mar 2000) |
| sexual potency | The ability to carry out and consummate sexual intercourse, usually referring to the male. (05 Mar 2000) |
| sexual preference | The biologic sex preferred in one's sexual partners. (05 Mar 2000) |
| sexual reproduction | The process where two cells (gametes) fuse to form one hybrid, fertilizedcell, results in a new genome that is different than that of either parent. (09 Oct 1997) |
| sexual selection | A form of natural selection in which, according to Darwin's theory, the male or female is attracted by certain characteristics, form, colour, behaviour, etc., in the opposite sex; thus modifications of a special nature are brought about in the species. (05 Mar 2000) |
| sterilization, sexual | Procedures for the purpose of rendering individuals incapable of reproduction. (12 Dec 1998) |