a basaltic rock consisting essentially of pyroxene and plagioclase with nepheline or leucite.
a variety of basalt containing plagioclase, augite, and a feldspathoid, commonly nepheline, or leucite
[tef-roh-kruh-nol-uh-jee] /ˌtɛf roʊ krəˈnɒl ə dʒi/ noun, Geology. 1. a geochronologic technique based on the dating of layers of volcanic ash.
noun 1. a mineral, silicate of manganese, Mn 2 SiO 4 , occurring in orthorhombic crystals.
noun 1. a city in and the capital of Nayarit, W central Mexico. noun 1. a state in W Mexico. 10,442 sq. mi. (27,045 sq. km). Capital: Tepic. noun 1. a city in W central Mexico, capital of Nayarit state: agricultural, trading and processing centre. Pop: 341 000 (2005 est) noun 1. a state of […]
adjective 1. moderately warm; lukewarm: tepid water. 2. characterized by a lack of force or enthusiasm: tepid prose; the critics’ tepid reception for the new play. adjective 1. slightly warm; lukewarm 2. relatively unenthusiastic or apathetic: the play had a tepid reception