əˈtäksə̇l, āˈ-, -ēl noun
( -s )
Etymology: International Scientific Vocabulary a- (II) + toxic + -yl; originally formed in German
: a white crystalline compound C 6 H 7 AsNNaO 3 .4H 2 O formerly used in the treatment of syphilis and sleeping sickness, its use frequently causing blindness : the monosodium salt of para -arsanilic acid