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HLA system

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noun

human leucocyte antigen system; a group of the most important antigens responsible for tissue compatibility, together with the genes that encode them. For tissue and organ transplantation to be successful there needs to be a minimum number of HLA differences between the donor's and recipient's tissue

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The rainy weather could not ________ my elated spirits on my graduation day.
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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