# acalycinous

CEFR C2 · Adjective

Source: https://englishreference.com/word/acalycinous
Updated: 2026-05-26

## Definition

describing a flower that does not have a calyx, which is the outer ring of petals.

For teachers: lacking a calyx, the outer whorl of floral organs that typically protects the flower bud.

## Examples

- The acalycinous flower lacks the outer layer of petals.
- Botanists identified the specimen as acalycinous because the outer floral envelope was completely absent.
- In some primitive flowering plants, the acalycinous condition is observed, where the sepals have not yet evolved into distinct structures to protect the reproductive organs.

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