areola

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areola

Anatomy any small circular area, such as the pigmented ring around the human nipple or the inflamed area surrounding a pimple

areola

[ə′rē·ə·lə]
(anatomy)
The portion of the iris bordering the pupil of the eye.
A pigmented ring surrounding a nipple, vesicle, or pustule.
A small space, interval, or pore in a tissue.
References in periodicals archive ?
sclereids of the areole or belong to the sarcotesta.
Thallus consisting of round, flattened, sorediate areoles; apothecia rare Candelariella reflexa 1.
For each collection we dissected corollas, fruits, and/or areoles to determine the presence of U.
orthogonal fifth-order veins, and quadrangular areoles but differing in
From this inferred ancestor there evolved an even larger-leafed clade, in which alveolarity and colleters, as well as quadrangular areoles and an orthogonal reticulum of quintenary veins, developed.
Boke (1941, 1951, 1952, 1953, 1955, 1956, 1957a, 1957b, 1959, 1961) studied the apical meristem and the development of areoles and tubercles in various species of tribe Cacteae (e.g., Coryphantha, Echinocactus, Epithelantha, Mammillaria, and Turbinicarpus), as well as species of Echinocereus.
Fronds are long-petiolate, with stramineous petioles as long or longer than the lamina; indument of simple hairs 0.1-0.15 mm long; laminae have (2-) 4-7 (-11) pairs of lateral ascending pinnae, pinnae are narrow-lanceolate, 3-4.5 cm wide, with acuminate apices and bases gradually attenuate, asymmetric, decurrent on the basiscopic side (Figure 1 A and B), with 5-7 areoles at the middle of lateral pinnae.
One characteristic of the Oligocene intrusive bodies is the creation of alteration areoles in Eocene volcaniclastics, and their hydrothermal phases have been generally accompanied by the formation of elements such as epithermal gold, copper, lead, zinc and kaolin.
Forewing with Sc+R forked in basal third of forewing, [Cu.sub.1] forked level with union of claval veins, M forked level with node, [Cu.sub.1] deeply convex distad of claval apex, almost reaching M, hence slightly detached; with a callus in costal cell, 6 apical areoles distad of stigma, apical part behind apex of clavus folding down and covering apex of abdomen.
However, Bowers (1996) suggests that the cladodes produced during the previous year leads to a higher number of unused areoles that translated into a higher number of new cladodes and flowers that was not necessarily coupled with rainfall.
speciosa (L.) Pers., having distinctive more or less quadrangular areoles filled with branching veinlets present between the secondary veins.
Its attractive appearance is additionally enhanced by white wool-like areoles. To prove an effective protection to the natural habitats of this cactus, it is necessary to develop effective propagation methods under artificial conditions.