noun
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A precious stone, usually of substantial monetary value or prized for its beauty or shine.
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(figuratively) Any precious or highly valued thing or person.
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Anything of small size, or expressed within brief limits, which is regarded as a gem on account of its beauty or value, such as a small picture, a verse of poetry, or an epigram.
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(obsolete) A gemma or leaf-bud.
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A geometrid moth of the species Orthonama obstipata.
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(computing) A package containing programs or libraries for the Ruby programming language.
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(uncountable, printing, uncommon, obsolete) A size of type between brilliant (4-point) and diamond (4½-point), running 222 lines to the foot.
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(Internet slang) Internet content of good quality.