Doublethreaded
Pronunciation : Dou"ble*thread`ed
Part of Speech : a.
Definition : 1. Consisting of two threads twisted together; using two threads.
2. (Mech.)
Defn: 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.
Source : Webster's Unabridged Dictionary, 1913