Wiktionary
isophane
n. 1 (context uncountable medicine English) A synthetic form of insulin used to treat diabetes 2 (context countable meteorology English) A line drawn on a map through points where a given seasonal biological event occurs on the same date
Usage examples of "isophane".
The NPH stood for Isophane, but that was too complicated to remember, so she thought of it as No Pee Hard, which was as good a description as any.