Relating to or having the characteristics of a columella, a small column-like structure found in plants or animals.
From Latin 'columella' (small column, diminutive of 'columna'), plus the suffix '-aceous' (having the nature of). The term is highly technical, combining anatomical Latin with English adjectival formation.
The columella is that tiny rod-like structure in the center of some fungi and seed pods—calling something 'collumelliaceous' is the kind of precise botanical terminology that makes botanists love their work, even if it makes everyone else's heads spin.
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