| fluke |
good luck: a stroke of luck a barb on a harpoon or arrow flat bladelike projection on the arm of an anchor either of the two lobes of the tail of a cetacean parasitic flatworms having external suckers for attaching to a host
출처: wordnet.princeton.edu/perl/webwn
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| fluorescence |
light emitted during absorption of radiation of some other (invisible) wavelength
출처: wordnet.princeton.edu/perl/webwn
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| fluorescent |
emitting light during exposure to radiation from an external source a lighting fixture that uses a fluorescent lamp brilliantly colored and apparently giving off light; "fluorescent colors"
출처: wordnet.princeton.edu/perl/webwn
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| fluoridation |
the addition of a fluoride to the water supply (to prevent dental decay)
출처: wordnet.princeton.edu/perl/webwn
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| fluorine |
a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite
출처: wordnet.princeton.edu/perl/webwn
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