Wiktionary
only children
n. (only child English)
Usage examples of "only children".
All children born to the same woman were siblings, but only children of the same sex referred to each other with the more intimate term of brother or sister, and then only when they were young or in rare moments of special closeness.
She followed Demetria past the campfire, where only children and older—.
She followed Demetria past the campfire, where only children and oldermeaning more than twentywomen sat efficiently butchering somethinga deer?