BB

abbr. double-black (pencil-lead).

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BB «BEE _BEE», noun.

1. a standard size of shot, approximately.18 of an inch in diameter.

2. a shot of this size used in a shotgun for large birds, such as wild geese, and especially in an air rifle; BB shot.

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1.

symbol a standard size of lead pellet used in air rifles

2.

abbr. Baseball base on balls

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/ˈbiːˌbiː/ noun, pl BBs [count]

: a small metal ball that is fired from a BB gun