lustre

Etymology 1

From Middle French lustre. See luster (etymology 1).

noun

1. (British spelling) Alternative form of luster (shine, etc.)
2. (geology) The way in which the surface of any particular type of mineral reflects light differently from other minerals, which is helpful in telling minerals apart.
   Various kinds of minerals differ in their lustre; iron pyrites are described as having a metallic lustre, glassy materials a vitreous lustre; others, such as opal, look resinous, and the lustres of yet others are described as being either pearly, or silky, or dull, like earth.
3. A glass ornament such as a prism or cut glass dangling beneath a chandelier; usually in clusters or festoons.
   ...he went out through the unfamiliar hall, setting the chandelier clashing its dusty lustres with his hand, leaving a prismatic jangle behind him in the empty house. 2013, Shena Mackay, Redhill Rococo
4. (dated) A chandelier, particularly one decorated with glass lustres.
   In the centre is painted an eagle, from whose beak an elegant glass lustre chandelier is suspended. There are also ten smaller chandeliers in different parts of the room. 1838, John Henry Brady, A new pocket guide to London and its environs
   On the ground floor, the library (a room in carved oak) is lighted by a lustre composed of twelve regenerative burners enclosed in tinted glasses. 1889, anonymous author, The Journal of Gas Lighting, Water Supply & Sanitary Improvement

verb

1. (British spelling) Alternative form of luster

Etymology 2

From Middle English lustre, from Latin lustrum, from Old Latin *loustrom, of uncertain origin. More at lustrum.

noun

1. (British spelling) Alternative form of luster: A 5-year period, especially (historical) in Roman contexts.

Etymology 3

From Latin lustra (“wilds, woods”), thought to derive from unattested *dustrum, from unattested Ancient Greek *δύστρον (*dústron, “place animals wallow”), from δύω (dúō, “to plunge, to wallow”).

noun

1. (British spelling, obsolete) Alternative form of luster: a den, a dwelling-place in a wilderness, especially for animals.