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fuse 1 also fuze (fyz)
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n.
1. A cord of readily combustible material that is lighted at one end to carry a flame along its length to detonate an explosive at the other end.
2. often fuze A mechanical or electrical mechanism used to detonate an explosive charge or device such as a bomb or grenade: "A mechanical ... switch is used to initiate the fuzes" (International Defense Review).
tr.v. fused, fus·ing, fus·es also fuzed or fuz·ing or fuz·es
To equip with a mechanical or electrical fuse.

[From Italian fuso, spindle (originally from its shape), from Latin fūsus.]

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2016 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 
fuse 2 (fyz)
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v. fused, fus·ing, fus·es
v.tr.
1.
a. To join (different pieces or elements) together physically, as by melting or heating: bits of glass fused in a kiln; atomic nuclei that are fused together inside the stars.
b. To blend or combine together: "Edison's invention strategy effectively fused research and development in a seamless process" (Seth Shulman).
2. To liquefy or reduce to a plastic state by heating; melt.
v.intr.
1.
a. To become physically joined together, as by melting.
b. To be combined or blended together: "There was no separation between joy and sorrow: they fused into one" (Henry Miller). See Synonyms at mix.
2. To become liquefied from heat.
n.
A safety device that protects an electric circuit from excessive current, consisting of or containing a metal element that melts when current exceeds a specific amperage, thereby opening the circuit.

[Latin fundere, fūs-, to melt; see gheu- in the Appendix of Indo-European roots.]

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2016 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 

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