Hypertext Webster Gateway: "Turnbuckle"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Turn-buckle \Turn"-buc`kle\, n. (Mech.)
(a) A loop or sleeve with a screw thread at one end and a
swivel at the other, -- used for tightening a rod, stay,
etc.
(b) A gravitating catch, as for fastening a shutter, the end
of a chain, or a hasp.
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