*tapp*

n. (Zool.) The lesser spotted woodpecker (Dendrocopus minor); -- called also tapperer, tabberer, little wood pie, barred woodpecker, wood tapper, hickwall, and pump borer. [ Prov. Eng. ] [ 1913 Webster ]

n. [ See Tapster. ] A female tapster. [ Obs. ] Chaucer. [ 1913 Webster ]

n. (Mach.) A lever or projection moved by some other piece, as a cam, or intended to tap or touch something else, with a view to produce change or regulate motion. G. Francis. [ 1913 Webster ]

Tappet motion, a valve motion worked by tappets from a reciprocating part, without an eccentric or cam, -- used in steam pumps, etc. [ 1913 Webster ]

. (Mech.) A rod carrying a tappet or tappets, as one for closing the valves in a Cornish pumping engine. [ Webster 1913 Suppl. ]

{ , v. i. See Tapish. [ 1913 Webster ]

1. A hen having a tuft of feathers on her head. [ Scot. ] Jamieson. [ 1913 Webster ]

2. A measuring pot holding one quart (according to some, three quarts); -- so called from a knob on the lid, thought to resemble a crested hen. [ Scot. ] Jamieson. [ 1913 Webster ]

n. [ Sp. tampón a stopper. ] (Irrigation) A piece of wood or sheet metal fitted into a ditch to dam up the water so as to overflow a field. [ U. S. ] [ Webster 1913 Suppl. ]

v. i. [ 1st pref. un- + tappice. ] to come out of concealment. [ Obs. ] Massinger. [ 1913 Webster ]