| helper cell |
helper T cell: T cell with CD4 receptor that recognizes antigens on the surface of a virus-infected cell and secretes lymphokines that stimulate B cells and killer T cells; helper T cells are infected and killed by the AIDS virus
출처: wordnet.princeton.edu/perl/webwn
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| heliotherapy |
therapeutic exposure to sunlight
출처: wordnet.princeton.edu/perl/webwn
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| heliotropism |
an orienting response to the sun
출처: wordnet.princeton.edu/perl/webwn
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| helium |
a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas)
출처: wordnet.princeton.edu/perl/webwn
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| helix |
a curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle coil: a structure consisting of something wound in a continuous series of loops; "a coil of rope" type genus of the family Helicidae
출처: wordnet.princeton.edu/perl/webwn
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