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单词 active ingredient
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active ingredient
10. Of a substance: having a (frequently strong) physiological or chemical effect on something; opposed to inert adj. 1b. Also: designating the part of a substance which is responsible for its biological or chemical effects, esp. in active ingredient.
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1639 J. Shirley Maides Revenge iii. sig. E4 Here is some of Hannibals medicine he carried alwaies in the Pummell of his sword, for a dead lift, a very active Poyson.
1646 Sir T. Browne Pseudodoxia Epidemica vi. xii. 336 I say, a vitriolous or copperous quality; for vitrioll is the active or chiefe ingredient in Inke. View more context for this quotation
1708 J. Harris Lexicon Technicum (ed. 2) I. at Clyssus A Medicine made of the most active and energetical Parts of any Ingredients.
1733 G. Cheyne Eng. Malady ii. xii. 243 Warm and active Oils and Ointments, especially the Opodeldoc.
1787 J. Collins in Med. Communications 2 372 The active ingredient..is the capsicum.
1857 D. Livingstone Missionary Trav. S. Afr. vi. 113 It contains an active poison.
1878 T. H. Huxley Physiography (ed. 2) 79 It is the oxygen which is the active agent.
1932 Discovery Mar. 96/2 The active substance can be extracted from the gland and chemically analysed; it is termed iodothyrin.
1959 K. H. Beyer in S. O. Waife & A. P. Shapiro Clin. Eval. New Drugs ii. 19 Some compounds are so active that no chemical or isotopic method may be suitable to follow them at pharmacodynamically effective dosages.
2008 Guardian 17 June (G2 section) 20/2 Lemon eucalyptus contains citriodiol, an active ingredient often cited as nature's answer to chemical repellants.
extracted from activeadj.n.
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