An abnormal narrowing or constriction of the elytra or the space where the beetle wing covers meet.
From Greek 'elytron' + 'stenosis' from 'stenos' (narrow), a medical suffix indicating pathological narrowing of any anatomical opening or space.
Stenosis is everywhere in medical terminology—narrowed blood vessels, narrowed airways, narrowed insect wing covers—all use this same Greek word for 'narrow' that physicians use 2,500 years later!
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