TOUCH-NEEDLE
\tˈʌt͡ʃnˈiːdə͡l], \tˈʌtʃnˈiːdəl], \t_ˈʌ_tʃ_n_ˈiː_d_əl]\
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A small bar of gold and silver, either pure, or alloyed in some known proportion with copper, for trying the purity of articles of gold or silver by comparison of the streaks made by the article and the bar on a touchstone.
By Oddity Software
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A small bar of gold and silver, either pure, or alloyed in some known proportion with copper, for trying the purity of articles of gold or silver by comparison of the streaks made by the article and the bar on a touchstone.
By Noah Webster.
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A small bar or needle of gold for testing articles of the same metal by comparing the streaks they make on a touchstone with those made by the needle.
By Daniel Lyons
Word of the day
tinctura quininae ammoniata
- A preparation made by dissolving quinin sulphate in alcohol [Br. Ph.].