metrochrome (plural metrochromes)
- (historical) An instrument with a lantern for measuring colours, used in conjunction with a telescope to note the colours of stars.
Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for metrochrome in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)