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单词 multipositive
释义

multipositiveadj.n.

Brit. /ˌmʌltɪˈpɒzᵻtɪv/, U.S. /ˌməltiˈpɑzədɪv/, /ˌməltiˈpɑztɪv/; see also multi- comb. form.
Origin: Formed within English, by compounding. Etymons: multi- comb. form, positive adj.
Etymology: < multi- comb. form + positive adj. With use as noun compare earlier multi-negative n.
A. adj.
Having more than one positive charge. Also: positive in more than one test or assay. rare.
ΚΠ
1927 Proc. National Acad. Sci. U.S.A. 13 738 White circles or ellipses with a numeral (3, 4 or 5) within for multipositive ions.
1978 Jrnl. Immunol. Methods 21 79 Normal degranulation could be recovered by pretreatment of the experimental surface with a multipositive charged molecule.
1989 Science 8 Dec. 1272 A developmental lineage with multipositive progenitor cells.
1998 Jrnl. Vet. Diagnostic Investig. 10 326 This reactivity was not due to cross-reactions as initially suspected, and these multipositive sera were designated false-positive sera.
B. n.
Printing. An array of many similar positive images used in the printing of small items several at a time by photolithography.
ΘΚΠ
society > leisure > the arts > visual arts > printmaking > photomechanical or process printing > [noun] > photolithography > images
multi-negative1922
multipositive1933
1933 C. M. Willy Pract. Photo-lithogr. vii. 158 After developing and fixing, the enlarged multi-positive thus obtained is masked and placed in the unit carrier ready for projection.
1971 D. Potter Brit. Elizabethan Stamps ii. 23 In the first stages of printing a multipositive is prepared, from which the printing cylinders are made.
1992 Gibbons Stamp Monthly Mar. 51/2 It seems fair to assume that this arrow was either engraved in error or appeared as a result of taking the images for the coil cylinder from a multipositive image already etched to provide images for sheet cylinders.
This entry has been updated (OED Third Edition, March 2003; most recently modified version published online March 2022).
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adj.n.1927
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