Any of a group of organic compounds having a six-member ring in which the first and fourth atoms are nitrogen and the rest are carbon. Pyrazines are components of many important compounds, including pteridines, some vitamins and antibiotics, and numerous dyes called phenazines.
[pi-raz-uh-leen, -lin, pahy-] /pɪˈræz əˌlin, -lɪn, paɪ-/ noun, Chemistry. 1. any of the group of heterocyclic compounds containing three carbon atoms, two adjacent nitrogen atoms, and one double bond in the ring. 2. the parent compound, C 3 H 6 N 2 .
noun, Chemistry. 1. any of the group of dyes, as tartrazine, derived from a pyrazolone: used chiefly to dye silk and wool.
[pi-raz-uh-lohn, pahy-] /pɪˈræz əˌloʊn, paɪ-/ noun, Chemistry. 1. any of the group of heterocyclic compounds containing the pyrazoline ring in which one carbon atom is doubly linked to an oxygen atom not in the ring. 2. the parent compound, C 3 H 4 N 2 O. pyrazolone py·raz·o·lone (pĭ-rāz’ə-lōn’) n. A class of nonsteroidal anti-inflammatory […]
[pahyuh r] /paɪər/ noun 1. a pile or heap of wood or other combustible material. 2. such a pile for burning a dead body, especially as part of a funeral rite, as in India. /paɪə/ noun 1. a heap or pile of wood or other combustible material, esp one used for cremating a corpse n. […]