| 释义 |
lachrymator|ˈlækrɪmeɪtə(r)|
Also lacrimator.
[f. lachrymat-, lacrimat- (in lachrymatory a. and n., etc.) + -or.]
Any substance which causes irritation and copious watering of the eyes when it comes into contact with them (in the form of a gas, spray, dust, or the like).
1918Jrnl. Amer. Med. Assoc. 30 Nov. 1823/1 Lacrimators (acetone, xylene or benzene bromid). 1922Encycl. Brit. XXXII. 111/2 Lachrymators, on account of the extreme sensitiveness of the eye, can produce an effect in extraordinarily weak concentrations. 1948Biochem. Jrnl. XLII. p. xxvi, The ‘—SH’ theory provides an explanation for the existence of two main groups of lachrymators: (a) substances containing a halogen atom in some such group as {b1}CH2Cl together with a neighbouring keto or other group which makes the halogen ‘positive’, (b) substances containing a {b1}CH{b2}CH{b1} group, also with a neighbouring keto or other group which polarizes the double bond. 1963Times 25 Apr. 6/4 Chloracetophenone, a lacrimator in adequate concentrations, had toxic effects. |