What does calycle mean?
A calycle is an extra whorl of small, leaf-like structures — bracts — that encircles certain flowers outside their true calyx, functioning much like a second, outer set of sepals. Botanists also call this feature an epicalyx, and it is especially well known in plants such as cotton, hibiscus, and strawberry, where the accessory whorl helps protect the developing bud. In zoology, particularly in studies of corals, the term can describe the cup-shaped skeletal depression in which a polyp sits. Derived from the Latin diminutive of 'calyx,' the Greek-Latin root meaning husk or cup, the word carries the same sense of a protective vessel as its relatives 'chalice' and 'calyx.' Though rarely encountered outside scientific writing, 'calycle' is valuable for anyone describing floral anatomy precisely, offering a compact name for a structure otherwise explained only through lengthy description.
nounA calycle is a secondary whorl of bracts or sepal-like structures surrounding a flower outside the true calyx, also known as an epicalyx. In zoology, the term can also refer to a cup-shaped or saucer-shaped body part.
- In botany: a whorl of bracts resembling an additional calyx outside the true calyx of a flower (also called an epicalyx).
- In zoology: a cup-shaped or saucer-shaped structure, such as the skeletal cup holding a coral polyp.
"The botanist noted that the hibiscus flower bore a distinct calycle beneath its green calyx."
"Cotton and hibiscus flowers are classic examples of blooms protected by an extra calycle."
"Each polyp sits within a stony calycle that records its growth like a fossil fingerprint."
The standard plural adds '-s'; the Latinate plural 'calyces' is occasionally seen but is not standard for this form.
"Both species bear persistent calycles that remain after the petals fall."
Hidden beneath some flowers lies a secret second calyx — the calycle, a spare set of sepals most people never notice is there.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of calycle
Calycle derives from the Latin 'calyculus,' a diminutive of 'calyx,' meaning husk or cup, which itself was borrowed from the Greek 'kalux' of the same meaning. The same Greek root gave English both 'calyx' and 'chalice,' making them true cognates of the term. It entered scientific English usage around the early seventeenth century, when botanical terminology was being systematized from classical sources. Its diminutive origin reflects the fact that a calycle is literally a 'little cup' arranged outside the main one.
Related word forms
How calycle is actually used
A technical term used almost exclusively in botany and, less often, in zoology; rare in everyday speech. The spelling variants 'calycle' and 'calicle' both occur, and the related form 'calyculus' appears in older botanical literature.
Easily confused with calycle
The calyx is the outermost true floral whorl of sepals, whereas the calycle is an additional ring of bracts situated outside it.
'Calicle' (or calycle) refers to this bracteate whorl, but in corals a 'calicle' specifically denotes the cup-like depression housing a coral polyp — a different structure entirely.