2 (def 1).
noun 1. a slide or transparency for projection by a slide projector or magic lantern. noun 1. (formerly) a photographic slide for projection, used in a magic lantern
noun 1. a wheel, used like a pinion, consisting essentially of two parallel disks or heads whose peripheries are connected by a series of bars that engage with the teeth of another wheel.
[lan-thuh-nahyd, -nid] /ˈlæn θəˌnaɪd, -nɪd/ noun, Chemistry. 1. any element of the lanthanide series. /ˈlænθəˌnaɪd/ noun 1. any element of the lanthanide series Also called rare earth, rare-earth element lanthanide lan·tha·nide (lān’thə-nīd’) n. Any of the chemically related elements with atomic numbers 57 through 71. Also called rare earth, rare-earth element. lanthanide (lān’thə-nīd’) Any of […]
noun, Chemistry. 1. the series of rare-earth elements of atomic numbers 57 through 71 (lanthanum through lutetium). noun 1. a class of 15 chemically related elements with atomic numbers from 57 (lanthanum) to 71 (lutetium)