a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar
a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer
a nonmetallic element belonging to the halogens; used especially in medicine and photography and in dyes; occurs naturally only in combination in small quantities (as in sea water or rocks)
a colorless nonflammable liquid used as a solvent for fats and oils; because of its toxicity its use as a cleaning fluid or fire extinguisher has declined
furnish with a preface or introduction; "She always precedes her lectures with a joke"; "He prefaced his lecture with a critical remark about the institution"
move ahead (of others) in time or space
be the predecessor of; "Bill preceded John in the long line of Susan's husbands"
come before; "Most English adjectives precede the noun they modify"
a substance that destroys micro-organisms that carry disease without harming body tissues
(extended sense) of exceptionally clean language; "lyrics as antiseptic as Sunday School"
clean and honest; "antiseptic financial practices"
thoroughly clean and free of or destructive to disease-causing organisms; "doctors in antiseptic green coats"; "the antiseptic effect of alcohol"; "it is said that marjoram has antiseptic qualities"
made free from live bacteria or other microorganisms; "sterilized instruments"
freeing from error or corruption; "the antiseptic effect of sturdy criticism"