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immunoassay
immunoassay n. 
/ˌɪmjᵿnəʊˈaseɪ/, /ɪˌmjuːnəʊəˈseɪ/, /ɪˌmjuːnəʊˈaseɪ/, /ᵻˌmjunoʊˈæˌseɪ/ the use of antibodies for the detection of and measurement of biochemical substances; any of various techniques involving this; cf. radioimmunoassay n.
Brit. /ˌɪmjᵿnəʊəˈseɪ/
, /ˌɪmjᵿnəʊəˈseɪ//ˌɪmjᵿnəʊˈaseɪ//ɪˌmjuːnəʊəˈseɪ//ɪˌmjuːnəʊˈaseɪ/U.S. /ˌɪmjənoʊˈæˌseɪ/
, /ˌɪmjənoʊˈæˌseɪ//ᵻˌmjunoʊˈæˌseɪ/ΘΚΠ
the world > action or operation > endeavour > trial or experiment > trial, test, or testing > [noun] > specific tests or testing > of strength of a substance on an organism
bioassay1912
biological assay1922
biological assay1926
immunoassay1959
1959 S. A. Berson & R. S. Yalow in Nature 21 Nov. 1648/2 We have previously reported on the immuno-assay of beef insulin.
1969 R. Hall et al. Fund. Clin. Endocrinol. xiv. 258/1 The hormone that reacts with anti-insulin serum in the immunoassay technique for insulin accounts for only a small part of the total ILA in plasma.
1999 C. B. Inlander et al. Over-the-counter Doctor (rev. ed.) 371/1 Pregnancy tests use an immunoassay to produce a colour change to indicate a positive result in urine.
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