'dust-back pitch' definitions:

Definition of 'dust-back pitch'

From: GCIDE

duster \dust"er\ (d[u^]st"[~e]r), n.
1. One who, or that which, dusts; a utensil that frees from dust. Specifically: (a) (Paper Making) A revolving wire-cloth cylinder which removes the dust from rags, etc. (b) (Milling) A blowing machine for separating the flour from the bran. (c) A dustcloth or a brush used for removing dust from objects or surfaces. [1913 Webster]
2. A long light overgarment; specifically (a) a light over-garment, formerly worn when traveling in open vehicles to protect the clothing from dust. [U.S.] (b) A light housecoat worn by women. (c) A light overcoat worn by women, often having no lining. [1913 Webster +PJC]
3. A device for spreading a powder, especially one for spreading insecticide on plants. [PJC]
4. (Baseball) A pitch intentionally thrown by a pitcher directly at or very close to the batter, intended to make the batter stand further away from home plate; also called a dust-back pitch or a dust-back. [PJC]
5. A dust storm. [PJC]