WordReference Random House Unabridged Dictionary of American English © 2017
E•lis•a  (i lisə, e lēsə),USA pronunciation n. 
  1. a female given name, form of  Elizabeth. 
Also,  E•li•sia  (i lishə).USA pronunciation 
ELISA  (i līzə, -sə),USA pronunciation n. 
  1. Medicinea sensitive diagnostic test for past or current exposure to an infectious agent, as the AIDS virus: a sample of blood is added to proteins from the agent, and any antibodies that combine with the proteins, indicating a history of infection, are detected by adding a test antibody linked to an enzyme that causes a color change.
  2. Medicine[Biol., Med.]any similar test using proteins as a probe for the identification of antibodies or antigens.
  • e(nzyme-)l(inked) i(mmuno)s(orbent) a(ssay)

Collins Concise English Dictionary © HarperCollins Publishers::

ELISA /ɪˈlaɪzə/ n acronym for
  1. enzyme-linked immunosorbent assay: an immunological technique for accurately measuring the amount of a substance, for example in a blood sample

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