(of a quadruped, usually a horse) To stand on two rear legs, as an aggressive or fearful gesture.

Alternative spelling of bruckback (“shotgun”)

Alternative spelling of bruckback (“shotgun”)

Third-person singular simple present indicative form of push back

simple past tense and past participle of push back

present participle of push back

long ago / far into the past

(linear algebra) A method of solving linear systems that have been transformed into row echelon form. / (combinatorics) A method of solving recurrence relations.

Alternative spelling of backbone

plural of back-bone