half-sider

English

This stick insect is male on the right and female on the left, as discernible from its coloration.

Noun

half-sider (plural half-siders)

1. A bilateral gynandromorph, an animal that is one sex on the left and another sex on the right.
2. An animal that is one color on the left and another on the right.
   • 1961, Thomas Geoffrey Taylor, Cyril Warner, Genetics for Budgerigar Breeders, page 104:

     If the lost choromosome had been the one carrying the blue gene, then a visual half-sider would not have resulted, although the bird would still be a genetic half-sider, one side pure Light Green and the other side Light Green/blue.