In botany, an opening in the integument of a seed through which the pollen tube enters during fertilization.
From Latin cloaca (opening/hollow) or potentially from cloam. In botanical terminology, this describes a specific structural opening in seeds.
This is such a specific word that most people never encounter it, but botanists use it to describe an incredible microscopic moment—the exact tiny opening where a pollen tube sneaks into a seed!
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