shotgun

n. smooth-barreled gun that fires small pellets over short distances and is used to hunt small game

A shotgun (also known as a fowling piece or scattergun) is a firearm typically used to fire a number of small spherical pellets called shot.
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Noun
1. firearm that is a double-barreled smoothbore shoulder weapon for firing shot at short ranges
(synonym) scattergun
(hypernym) firearm, piece, small-arm
(hyponym) fowling piece
(part-meronym) pump action, slide action

(n.)
A light, smooth-bored gun, often double-barreled, especially designed for firing small shot at short range, and killing small game.
  

A weapon designed or redesigned, made or remade, and intended to be fired from the shoulder and designed or redesigned and made or remade to use the energy of the explosive in a fixed shotgun shell to fire through a smooth bore either a number of ball shot or a single projectile for each single pull of the trigger. 18 USC