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Pronunciation varies by accent · noun
A small bar of gold and silver, either pure, or alloyed in some known proportion with copper, for testing the purity of gold or silver articles by comparison of the streaks made by the article and the bar on a touchstone..
Use touch-needle when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Touch-needle means A small bar of gold and silver, either pure, or alloyed in some known proportion with copper, for testing the purity of gold or silver articles by comparison of the streaks made by the article and the bar on a touchstone..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use touch-needle where its definition matches the intended context.
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