| hydrous | 1. Containing water; watery. 2. <chemistry> Containing water of hydration or crystallization. Origin: Gr. "ydwr water. Source: Websters Dictionary (01 Mar 1998) |
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| hydrous wool fat | The greasy substance obtained from the wool of the sheep Ovis aries (family Bovidae). Used as an emollient base for creams and ointments. Synonym: hydrous wool fat, lanolin, wool wax. Origin: L. Fat of wool (05 Mar 2000) |