spironolactone

 
Pronunciation: /ˌspʌɪrənə(ʊ)ˈlaktəʊn/

noun

[mass noun] Medicine
  • a steroid drug which promotes sodium excretion and is used in the treatment of certain types of oedema and hypertension.

Origin:

1960s: from spiro-1 (sense 2) + lactone, with the insertion of -one