Sib

n.	1.	A blood relation.
	2.	a sibling.
a.	1.	Related by blood; akin. Your kindred is but . . . little sib to you. - Chaucer. [He] is no fairy birn, ne sib at all To elfs, but sprung of seed terrestrial. - Spenser.

Noun	1.	sib - a person's brother or sister Synonyms: sibling
	2.	sib - one related by blood or origin; especially on sharing an ancestor with another Synonyms: blood relation, blood relative, cognate

Service Independent building Block (IN)affiliated, agnate, akin, allied, ancestry, avuncular, blood, blood relation, blood relative, clansman, closely related, cognate, collateral, collateral relative, congeneric, connections, consanguine, consanguinean, consanguineous, distaff side, distant relation, distantly related, enate, family, flesh, flesh and blood, folks, foster, friendly, german, germane, kin, kindred, kinfolk, kinnery, kinsfolk, kinsman, kinsmen, kinswoman, kith and kin, matrilateral, matrilineal, matroclinous, near relation, next of kin, novercal, of the blood, patrilateral, patrilineal, patroclinous, people, posterity, receptive, related, relations, relatives, sibling, spear kin, spear side, spindle kin, spindle side, sword side, tribesman, uterine, uterine kin, well-disposed