I consider this to be a rather terse summary and really rather useless for our purposes. You know, it may be time to get a more recent dictionary. O ther references say that gender refers to sociological roles while sex is used for actual physical differences. I could argue even these definitions, but they'll suffice for our purposes. W e have the previously mentioned sexes of male, female, and hermaphrodite, but there are two known variations of hermaphrodites - those that can reproduce with themselves and those that must mate with another of it's own species to procreate.
Intersexual animals combine male and female organs without being hermaphroditic.
With as much as 10-20 percent of the bears in some populations displaying these characteristics, this could not be dismissed as a birth defect. They are able to reproduce and give birth to cubs successfully. T here are also many species that have transsexual sexes - the individuals actually change sex as a regular part of their life cycle. This might be caused by environmental factors, reaching a certain age or size, or it may occur spontaneously. Pay close attention, there may be a test later.