【医】 加拿大松脂

Pitch \Pitch\, n. [OE. pich, AS. pic, L. pix; akin to Gr. ?.]
1. A thick, black, lustrous, and sticky substance obtained by
boiling down tar. It is used in calking the seams of
ships; also in coating rope, canvas, wood, ironwork, etc.,
to preserve them.

He that toucheth pitch shall be defiled therewith.
--Ecclus.
xiii. 1.

2. (Geol.) See {Pitchstone}.

{Amboyna pitch}, the resin of {Dammara australis}. See
{Kauri}.

{Burgundy pitch}. See under {Burgundy}.

{Canada pitch}, the resinous exudation of the hemlock tree
({Abies Canadensis}); hemlock gum.

{Jew's pitch}, bitumen.

{Mineral pitch}. See {Bitumen} and {Asphalt}.

{Pitch coal} (Min.), bituminous coal.

{Pitch peat} (Min.), a black homogeneous peat, with a waxy
luster.

{Pitch pine} (Bot.), any one of several species of pine,
yielding pitch, esp. the {Pinus rigida} of North America.