a slide or transparency for projection by a slide projector or magic lantern.
(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)
[lan-thuh-nuh m] /ˈlæn θə nəm/ noun, Chemistry. 1. a rare-earth, trivalent, metallic element, allied to aluminum, found in certain minerals, as monazite. Symbol: La; atomic weight: 138.91; atomic number: 57; specific gravity: 6.15 at 20°C. /ˈlænθənəm/ noun 1. a silvery-white ductile metallic element of the lanthanide series, occurring principally in bastnaesite and monazite: used in […]