(cricket) The first batsman of an innings. / (cricket) One of the first two batsmen of an innings. / (figuratively) The first of a series, usually a chronological series.

plural of opening batsman

A wound which pierces the skin (and/or exterior bones), so as to bare flesh and/or internal organs.

plural of open door

(idiomatic) To lead to opportunities or (social) advantages.

plural of floating point operation

plural of operating theatre

plural of open valley

Alternative spelling of opp (“opposite”)

Abbreviation of opuses.