IPA: /ˌɪntərˈstreɪn/
KK: /ɪntərˈstreɪn/
Relating to or occurring between different strains, often used in biological or genetic contexts.
The interstrain competition led to interesting variations in the results of the experiment.
Interstrain is formed from "inter-" (meaning between) and "strain" (from Old French *estrain*, meaning to stretch or exert). The word refers to the act of exerting or stretching between different forces or elements.
Think of 'between' ('inter-') and 'stretching' ('strain') to remember that 'interstrain' means to stretch or exert influence between different elements.