trough Definition from the Nature topic

Collection Transfer separated serum or plasma to a plastic transport tube Trough concentrations should be monitored The trough sample is drawn immediately

Where does the noun trough come from? The earliest known use of the noun trough is in the Old English period trough is a word inherited from

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trough Trough drinker for free stalls cattle _Mod _480 2 Variants Valve Trough Drinker Mod 480 ¾ connection from bottom cattle _Mod _490