Plural of corm; multiple underground plant structures made of compressed stem tissue that store energy and produce new plants.
From Greek 'kormos' meaning 'tree trunk' or 'stem.' The plural simply adds the standard English -s. Originally meant the trunk of a tree before being applied to bulb-like structures.
A single crocus corm planted in fall somehow 'knows' to flower in spring—it uses temperature sensing and photoperiodism to time emergence perfectly, making corms miniature computers that solve complex seasonal math.
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