heat-seeking

World English Dictionary
heat-seeking
 
adj
1.  (of a detecting device) able to detect sources of infrared radiation: a heat-seeking camera
2.  (of a missile) able to detect and follow a source of heat, as from an aircraft engine: a heat-seeking missile
 
heat seeker
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Heat-seeking is always a great word to know.
So is flibbertigibbet. Does it mean:
a chattering or flighty, light-headed person.
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
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