step-sibling

See also: stepsibling

English

Etymology

step- +‎ sibling

Noun

step-sibling (plural step-siblings)

1. Alternative form of stepsibling
   • 1922, Edward Winslow Gifford, Californian Kinship Terminologies, volume 18, page 191:

     Northern Wintun (16a) utilizes a term, also applied to co-wife or co-husband, which signifies parallel cousin of like sex and step-sibling of like sex; the four usual sibling terms are also employed.