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 ?
Both taxa have goblet-shaped podetia covered with coarse areoles and produce fumarprotocetraric acid.
by having rhizome scales that are relatively smaller, moderately dense, with dark brown central portions and narrower pale margins; blades that are 1-pinnate basally to pinnatisect distally and relative narrower; pinnae that are sessile and deltate to deltate-lanceolate; fewer series of areoles and sori, spores that are whitish, ellipsoidal, most well developed and a few collapsed.
A fabric of finer veins between the main veins forms an irregular reticulum of polygonal areoles.
Apex of sterile leaf blades rounded; veins of sterile blades forming areoles without secondary areoles, but with included free vienlets; fresh plants not malodorous; plants not usually associated with limestone outcroppings.
subcrenata by there being two or more free veins in costal areoles in B.
on the higher order venation patterns, the areoles, and the ultimate
Areoles range from imperfect to well developed and are
The surface of Dicksonia sellowiana spores are granulated or reticulate with strands of fused spheres surrounding somewhat depressed areoles as observed by Tryon and Tryon (1982).
They had radially elongated, irregular, shared areoles lacking freely ending veinlets.
The fern genus Phlebodium is traditionally described as having a row of costal areoles lacking included veins, with the sori located in extra-costal areoles and each sorus served by two veinlets.