chelmsforditen.
Etymology: < Chelmsford + -ite suffix1.Previous versions of the OED give the stress as: ˈchelmsfordite.
Mineralogy.
1818 J. F. Dana & S. L. Dana 21 It occurs in small quantity disseminated in Chelmsfordite.
This entry has not yet been fully updated (first published 1889; most recently modified version published online June 2019).