tectonic plates [(tek-ton-ik)]
The dozen or so plates that make up the surface of the Earth. Their motion is studied in the field of plate tectonics.
Note: The plates are not the same as the continents. The North American plate, for example, extends from the middle of the Atlantic Ocean to the west coast of the United States and Canada. These plates are about thirty miles thick.
noun, (used with a singular verb) 1. the science or art of assembling, shaping, or ornamenting materials in construction; the constructive arts in general. 2. structural geology. noun (functioning as sing) 1. the art and science of construction or building 2. the study of the processes by which the earth’s crust has attained its present […]
noun, Geology. 1. diastrophism (def 1).
noun, plural tectums, tecta [tek-tuh] /ˈtɛk tə/ (Show IPA). Anatomy, Zoology. 1. a rooflike structure. tectorial tec·to·ri·al (těk-tôr’ē-əl) adj. Of, relating to, or characteristic of a tectorium. tectum tec·tum (těk’təm) n. pl. tec·ta (-tə) A rooflike structure of the body, especially the dorsal part of the mesencephalon. tec’tal (-təl) adj.
- Tectorial membrane
/tɛkˈtɔːrɪəl/ noun 1. the membrane in the inner ear that covers the organ of Corti