Plural of caulis, the Latin term for the main stem or axis of a plant.
Direct Latin plural of 'caulis' (stem), used in botanical Latin to describe the primary structural element of plants. The word has Indoeuropean roots related to other stem/stalk words.
Botanists still use Latin plurals like 'caules' because it sounds more scientific and connects modern plant study back to centuries of botanical tradition—it's like speaking the secret language of plant knowledge.
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