extremely black or dark as pitch:
a pitch-black night.
extremely dark; unlit: the room was pitch-black
of a deep black colour
[pich-blend] /ˈpɪtʃˌblɛnd/ noun, Mineralogy. 1. a massive variety of uraninite, occurring in black pitchlike masses: a major ore of uranium and radium. /ˈpɪtʃˌblɛnd/ noun 1. a blackish mineral that is a type of uraninite and occurs in veins, frequently associated with silver: the principal source of uranium and radium. Formula: UO2 n. also pitch-blende, 1770, […]
noun, Machinery. 1. .
noun, Masonry. 1. a broad-edged chisel for cutting plane surfaces on stones.
noun, Machinery. 1. an imaginary circle within the profiles of the teeth of a gear, such that it rotates against a similar circle rotating at the same rate on a meshing gear. noun 1. an imaginary circle passing through the teeth of a gearwheel, concentric with the gearwheel, and having a radius that would enable […]