ˌ ̷ ̷ ̷ ̷ˈnīəzə̇d noun
( -s )
Etymology: isoni cotinic acid hydr azide
: a crystalline compound C 5 H 5 NCONHNH 2 used orally or intramuscularly in the treatment of tuberculosis often in conjunction with streptomycin or dihydrostreptomycin and para-aminosalicylic acid; isonicotinic acid hydrazide