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perfervid
perfidy
perfin
perfoliate
perforate
perforated
perforation
perforce
perforin
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performance
performance appraisal
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performance bond margin
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perforin
perforin [ púrfərin ]


noun 
Definition:
 
immunology hole-boring molecule: a substance produced by cytotoxic T-cells and natural killer cells that attacks and kills foreign cells by forming pores in their membranes
[Late 20th century. <perforate + -in]
Encarta® World English Dictionary [World English Edition] © & (P)2008 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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