low-grade

low-grade

[loh-greyd]
adjective
of an inferior quality, worth, value, etc.: The mine yields low-grade silver ore.

Origin:
1875–80; low1 + grade

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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WordNet
low-grade

adjective
of inferior quality 
WordNet® 3.0, © 2006 by Princeton University.
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00:10
Low-grade is always a great word to know.
So is interrobang. Does it mean:
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
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