Relating to or occurring above the cotyledons (seed leaves) in plant development.
From Greek 'epi-' (upon) + 'kotyledon' (seed leaf) + '-an' (pertaining to). A botanical term for the upper growth region of seedlings.
Plant scientists study the epicotyledean region to understand how tiny seedlings 'decide' which way is up—this gravity-sensing system in the stem tip is so sophisticated it inspired roboticists designing better sensors.
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