أُبْنَةٌ

A knot in wood, or in a branch; (S, M, K;) or in a staff, or stick; (T;) and in a bow, (TA,) [i. e.] the place of the shooting forth of a branch in a bow, (M,) which is a fault therein; (TA;) and in a rope, or cord: (M in article اثل:) plural أُبَنٌ. (T, S.)

Hence, (M,) (tropical:) A fault, defect, or blemish, (T, M, K, TA,) in one's grounds of pretension to respect, (T, TA,) and in speech, or language. (M, TA.)

(assumed tropical:) Particularly The enormity that is committed with one who is termed مَأْبُون. (TA.)

And (tropical:) Rancour, malevolence, malice, or spite: (K, TA:) and enmity: plural as above. (TA.) You say, بَيْنَهُمْ أُبَنٌ (tropical:) (S, TA) Between them are enmities. (S.)

Also The [part called] غَلْصَمَة [meaning the epiglottis] of a camel. (M, K.)