-valentcomb. form

Primary stress is attracted to the first syllable of this combining form and vowels may be reduced accordingly.

Etymology: < Latin valent-em, present participle of valēre to be worth.

A formative element occurring in a few words of general currency, as equivalent, prevalent (directly < Latin), ambivalent, and in various scientific contexts, being used with prefixes denoting number: (a) in Chemistry, usually with pronunciation

/ˈveɪlənt/, forming adjectives denoting ‘having a valency of the specified number’ (valency n. 2); also used in an analogous sense in Immunology (cf. multivalent adj. 1c); also with arabic number prefixed; (b) in Cytology (usually with pronunciation /vələnt/) forming adjectives and nouns denoting ‘(a meiotic structure) composed of the specified number of chromosomes’ (cf. multivalent adj. and n., quadrivalent adj. and n., trivalent adj. and n.).This suffix was first used in its Chemistry sense by L. Meyer 1864, in Mod. Theorien d. Chem. 67.

ΚΠ

1977 Lancet 25 June 1338/2 A double-blind controlled trial of a 14-valent pneumococcal polysaccharide vaccine was carried out.

This entry has not yet been fully updated (first published 1986; most recently modified version published online March 2019).

单词	-valent
释义	-valentcomb. form Primary stress is attracted to the first syllable of this combining form and vowels may be reduced accordingly. Etymology: < Latin valent-em, present participle of valēre to be worth. A formative element occurring in a few words of general currency, as equivalent, prevalent (directly < Latin), ambivalent, and in various scientific contexts, being used with prefixes denoting number: (a) in Chemistry, usually with pronunciation /ˈveɪlənt/, forming adjectives denoting ‘having a valency of the specified number’ (valency n. 2); also used in an analogous sense in Immunology (cf. multivalent adj. 1c); also with arabic number prefixed; (b) in Cytology (usually with pronunciation /vələnt/) forming adjectives and nouns denoting ‘(a meiotic structure) composed of the specified number of chromosomes’ (cf. multivalent adj. and n., quadrivalent adj. and n., trivalent adj. and n.).This suffix was first used in its Chemistry sense by L. Meyer 1864, in Mod. Theorien d. Chem. 67. ΚΠ 1977 Lancet 25 June 1338/2 A double-blind controlled trial of a 14-valent pneumococcal polysaccharide vaccine was carried out. This entry has not yet been fully updated (first published 1986; most recently modified version published online March 2019). < comb. form1977
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