A small stem or the embryonic stem of a plant, especially the tiny stem visible inside a seed.
From Latin 'cauliculus', a diminutive of 'caulis' (stem), literally meaning 'little stem'. Used in botanical anatomy to describe small or rudimentary stems.
When you look at a sprouted seed under a microscope, that miniature stem is the caulicle—it's the living proof that seeds contain complete tiny plants waiting to wake up and grow.
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