meco-comb. form
Stress is usually determined by a subsequent element and vowels may be reduced accordingly; see e.g.
Mecoptera n.Origin: A borrowing from Greek, combined with an English element. Etymons: Greek μῆκος , -o- connective.
Etymology: < ancient Greek μῆκος length ( < the base of μακρός long: see macro- comb. form) + -o- connective. Compare the ancient Greek derivative μηκόθεν from afar; μηκο- as a combining form appears to be found only in medieval Greek μηκοποιεῖν to lengthen. English formations are found apparently at the end of the 16th cent. with reference to the measurement of length and distance (see mecometry n.) and in the second half of the 19th cent. with reference to the proportions of the body or its parts (e.g. mecocephalic adj.).
This is a new entry (OED Third Edition, June 2001; most recently modified version published online June 2020).