discernible (adj.)

also discernable, "perceptible, visible, observable," 1560s, from French discernable, from discerner "distinguish (between), separate" (see discern). Form with -a- was more common at first; spelling changed to -i- 17c. to conform to Late Latin discernibilis. Related: Discernibly.

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Definitions of discernible from WordNet

discernible (adj.)
perceptible by the senses or intellect;
the newspaper reports no discernible progress in the negotiations
the skyline is easily discernible even at a distance of several miles
things happen in the earth and sky with no discernible cause
Synonyms: discernable
discernible (adj.)
capable of being perceived clearly;
an essay with a meaning that was not always discernible
discernible (adj.)
capable of being seen or noticed;
a discernible change in attitude
Synonyms: evident / observable