from the GNU version of the Collaborative International Dictionary of English
- adj. Consisting of two threads twisted together; using two threads.
- adj. 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.
from The Century Dictionary and Cyclopedia
- Having or sewing with two threads, as a sewing-machine having both needle and shuttle.
- Having two screw-threads which start at points 180 degrees apart and have each twice the pitch which appears from measuring from the tip of one thread to the tip of the next parallel to the axis. Double-threaded screws give very rapid motion to the nut.
Sorry, no etymologies found.
A galvanized steel ferrule two inches long and about as thick as a lead pencil was double-threaded inside, at both ends, one thread to the right, the other to the left, and corresponding threads were cut on the ends of the wires to be joined so that the same turn of the ferrule would screw both ends at once.
If the neck is too broad it may be transfixed several times with a double-threaded needle and then be tied in sections.
What made Gross's imagination, and what makes this book so subtle, was the Englishness and the Jewishness double-threaded, neither vanquishing the other.
There's a double-threaded center post which Whimsy says makes it almost impossible to lose the glass bead.
That said, if you use double-threaded extenders, with which you remove the valve core, screw the extender into the valve where the core was, and then screw the core into the top of the extender, you lose none of the valve’s function.