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Related to verticil: vertical definition


A circular arrangement, as of flowers, leaves, or hairs, growing about a central point; a whorl.

[Latin verticillus, the whorl of a spindle, diminutive of vertex, vertic-, highest point; see vertex.]


(Biology) biology a circular arrangement of parts about an axis, esp leaves around a stem
[C18: from Latin verticillus whorl (of a spindle), from vertex]


(ˈvɜr tə sɪl)

a whorl of leaves around a point on an axis.
[1695–1705; < Latin verticillus spindle whorl derivative of vertex vertex]
ver•tic•il•late (vərˈtɪs ə lɪt, -ˌleɪt, ˌvɜr təˈsɪl eɪt, -ɪt)


 a number or set of organs or parts of items arranged in a circle or round an axis, 1793.
Examples: verticil of beads, 1703; of branches, 1881; of leaves, 1872.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.verticil - a whorl of leaves growing around a stemverticil - a whorl of leaves growing around a stem
curl, curlicue, gyre, ringlet, scroll, whorl, coil, roll - a round shape formed by a series of concentric circles (as formed by leaves or flower petals)
References in periodicals archive ?
Both genera have singleveined leaves which are more or less united at the base in each verticil.
Annularia spinulosa has also more leaves (16 to 32) per verticil.
Annularia microphylla has a similar number of leaves per verticil, but these are sickle-shaped and narrow gradually from a maximum width at mid-length to a pointed apex.
153) noted only the differences in leaf length in a verticil, and (on p.
COMPARISONS: Annularia spinulosa (= Annularia stellata) has 16 to 32 leaves per verticil with 25-45 mm length.
There are 12 to 16 leaves in a verticil, united at the base to constitute an annulus, oblanceolate, with maximum width in the upper third and gradually tapering to an obtuse, mucronate apex.
Annularia spicata has smaller, oblong leaves, with pointed apices; there are also fewer leaves per verticil in Annularia spicata.
han arrojado importantes resultados en cuanto a propiedades biologicas se refiere, tal es el caso de los estudios realizados con el extracto con eter de petroleo de Tagetes verticil lata Lag.
1A): 12-segmented, relatively short, if bent backward not extending to the stalk of halters; scape black, elongated, cylindrical; pedicel black, very short, cup-shaped; flagellum black, long-cylindrical, basally expanded, each of flagellomere subequal in length; verticils black, dorsal verticils subequal to the corresponding flagellomeres from which they arise.
The conidiophores consisted of terminal divaricate verticils and metullae originated from apex of conidiophores in groups of 4-5 bearing phialids arranged in verticils of 4-6.
The combination of a spiciform inflorescence with a fragile rachis, bearing verticils of 4-6 spikelets, the spikelets with single unisexual flowers, the pistillate ones disarticulating below the glumes, along with a set of other unifying features, is good evidence that Parianeae represent a natural group (Clayton & Renvoize, 1986; Hollowell, 1987).