picrochromite
Mineralogy
noun
A chromite of magnesium, MgCr2O4, belonging to the spinel group, whose pure form is known only as a synthetic product and which occurs naturally as a brittle black mineral that contains a substantial amount of ferrous iron replacing magnesium.
Origin
1920s.
- overshoot the mark
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- oversight
- oversight committee
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- a brick short of a load
- a brick short of a load (or two sandwiches short of a picnic, etc.)
- abricotine
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- abrogate
- abrogation