( v. t. )
A very small quantity of an element or compound in a given substance, especially when so small that the amount is not quantitatively determined in an analysis; -- hence, in stating an analysis, often contracted to tr.
( v. t. )
A very small quantity of an element or compound in a given substance, especially when so small that the amount is not quantitatively determined in an analysis; -- hence, in stating an analysis, often contracted to tr.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012