Growing or developing from the tip or apex upward, as in certain plant structures that extend toward the top.
From Greek 'akron' (tip) and 'spirein' (to coil or spiral), combining to describe spiral growth patterns originating from the apex of a structure.
This rare botanical term captures the spiral patterns you see in ferns and certain fungi—nature's way of building structures that maximize exposure to light and air by growing tip-first in elegant coils.
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