sibling

About 2.58 uses per million words.

Meaning

1. noun A person who shares a parent; one's brother or sister who one shares a parent with.

   None of my siblings are married yet.

2. noun A node in a data structure that shares its parent with another node.
3. noun The most closely related species, or one of several most closely related species when none can be determined to be more closely related.

Similar words

sib brother brethren parent sisterly sister bro brotherly fraternal brotherhood

Often followed by

rivalry relationships of or and species relationship is who

Word family

siblings