XENOTIME

xenotime

(noun) a brown-to-yellow mineral that is a phosphate of yttrium in crystalline form

Source: WordNet® 3.1

Etymology

Noun

xenotime (countable and uncountable, plural xenotimes)

(mineral) A yellow-brown mineral, yttrium phosphate (YPO₄)

Source: Wiktionary

Xen"o*time, n. Etym: [Gr. xe`nos guest, stranger + xenotim.] (Min.)

Definition: A native phosphate of yttrium occurring in yellowish-brown tetragonal crystals.

Source: Webster’s Unabridged Dictionary 1913 Edition