dimorphite

[ dahy-mawr-fahyt ]
/ daɪˈmɔr faɪt /

noun

a mineral, arsenic sulfide, As4S3, yellow-orange in color and similar in its properties to orpiment.

Origin of dimorphite

First recorded in 1850–55; dimorph + -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019