(baseball) A period of play in which members of a visiting baseball team attempt to hit a baseball pitched by the opposing home team until three players are called out, followed by a similar attempt by members of the home baseball team against the visiting team's pitching. There are nine or more innings in a regulation baseball game.

present participle of inn

(cricket) One side's (from when the first player begins to bat, until the last player is out) or individual player's turn to bat or the runs scored during those durations.

plural of inning

(astronomy) Isolated neutron star. / (aviation) Initialism of inertial navigation system. / (US, historical) Immigration and naturalization service.

Abbreviation of insurance.

plural of in

(computing) insert

(chiefly non-productive) Of or pertaining to. / Used to form demonyms.

Found in the plural forms of a small number of English words. Not productive.