different between isophane vs isophene

English

isophane (countable and uncountable, plural isophanes)

(uncountable, medicine) A synthetic form of insulin used to treat diabetes.
(countable, meteorology) A line drawn on a map through points where a given seasonal biological event occurs on the same date.

iso- + the first element of phenology, the word having been first used to refer to phenological phenomena.

isophene (plural isophenes)

A line (on a map, etc.) joining places where a particular biological phenomenon is exhibited in the same way, such as where plants flower at the same time (an isanthesic) or where the same proportion of clines is found.

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