单词 | para-aminobenzoic |
释义 | para-aminobenzoicadj. Chemistry. para-aminobenzoic acid n. the para-isomer of aminobenzoic acid, (H2N)C6H4(COOH), which is widely distributed in plant and animal tissue, is used in sunscreens, in manufacturing folic acid, azo dyes, etc., and in laboratories as a sulphonamide antagonist, and is sometimes considered a member of the vitamin B group. Abbreviated PABA. ΚΠ 1904 Proc. Royal Soc. 73 164 The conductivities of solutions of para-amino-benzoic acid have been measured. 1940 Nature 28 Dec. 838/2 (heading) Para-amino benzoic acid as a bacterial growth factor. 1987 N. J. Smith & C. L. Stanitski Sports Med. xxiv. 177 It is essential to protect exposed surfaces with sunscreen containing paraaminobenzoic acid. 2002 Times 13 Mar. (Business section) 34/1 Para-aminobenzoic acid, cyanocobalamin (or hydroxycobalamin, vitamin B12) or even foliate [sic] have been included in the complex. This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022). < adj.1904 |
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