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ˈisatyde
ˈisatyde n.
Brit. 
/ˈʌɪsətʌɪd/
, /ˈʌɪsətʌɪd/U.S. /ˈaɪsəˌtaɪd/
(†isathyd) a substance bearing the same relation to isatin that indigo-white bears to indigo-blue, being formed from it by the addition of one atom of hydrogen./ˈaɪsəˌtaɪd/ΚΠ
1865–72 H. Watts Dict. Chem. III. 411 Isatyde is white, with a slightly greyish tint, tasteless, and inodorous. It..separates on cooling in microscopic scales.
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