( a. )
Having two screw threads instead of one; -- said of a screw in which the pitch is equal to twice the distance between the centers of adjacent threads.
( a. )
Having two screw threads instead of one; -- said of a screw in which the pitch is equal to twice the distance between the centers of adjacent threads.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012