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heptahydrated
heptahydrated adj.
Brit. 
/ˌhɛptəhʌɪˈdreɪtᵻd/
, /ˌhɛptəhʌɪˈdreɪtᵻd/U.S. /ˌhɛptəˈhaɪˌdreɪdᵻd/
Chemistry containing seven molecules of water./ˌhɛptəˈhaɪˌdreɪdᵻd/ΚΠ
1895 G. Lunge Theoret. & Pract. Treat. Manuf. Sulphuric Acid & Alkali (ed. 2) II. 22 The anhydrous salt..if protected from the air is changed into heptahydrated..salt.
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