'Double-threaded' definitions:

Definition of 'Double-threaded'

From: GCIDE

Double-threaded \Dou"ble-thread`ed\, a.
1. Consisting of two threads twisted together; using two threads. [1913 Webster]
2. (Mech.) 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. [1913 Webster]