Relating to or pertaining to the apex; of or concerning the tip or pointed end of a structure.
From Latin 'apex' with the '-ial' suffix (alternative to '-al'). This is a synonym for 'apical' but uses a different adjectival ending, common in technical biological terminology.
While 'apical' and 'apicial' mean the same thing, scientists sometimes prefer 'apicial' in certain contexts because it sounds more formal and distinct, even though both words exist and are technically correct.
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