A ring or set of appendages of adaxial tissue arising from the corolla or the outer edge of the stamens, present in some plants (Narcissus, Passiflora, etc.); a paraperigonium.
The circumference of the base of the glans penis in human males.
The main body of the test of an echinoid, consisting of ambulacral and interambulacral areas.
A manifestation of secondary syphilis, consisting of papular lesions along the hairline, often bordering the scalp in the manner of a crown.
A region of the skull located along the coronal suture, at the junction between the frontal bone and the two parietal bones.
A crown or garland bestowed among the Romans as a reward for distinguished services.
A luminous appearance caused by corona discharge, often seen as a bluish glow in the air adjacent to pointed metal conductors carrying high voltages.
A coronavirus, especially SARS-CoV-2.
Any appendage of an organism that resembles a crown or corona (sense 4.1).
A long, straight-sided cigar with a blunt, rounded end.
Any luminous or crownlike ring around an object or person.
A fringe of large, bulbous surface projections on coronaviruses, formed by viral spike peplomers, creating an appearance reminiscent of the solar corona.
A disease caused by a coronavirus, especially COVID-19.
A large, round, pendent chandelier, with spikes around its upper rim to hold candles or lamps, usually hung from the roof of a church.
The luminous plasma atmosphere of the Sun (the solar corona) or other star, extending millions of kilometres into space, most easily seen during a total solar eclipse.
The large, flat, projecting member of a cornice which crowns the entablature, situated above the bed moulding and below the cymatium.
An oval-shaped astrogeological feature, present on both the planet Venus and Uranus's moon Miranda, probably formed by upwellings of warm material below the surface.
An annular ciliated organ on the head of rotifers, used for locomotion and sweeping food into the mouth.
The external (supragingival) portion of the tooth, covered by enamel; the crown.
A circle or set of circles visible around a bright celestial object, especially the Sun or the Moon, attributable to an optical phenomenon produced by the diffraction of its light by small water droplets or tiny ice crystals.
A mineral zone, consisting of one or more minerals, which surrounds another mineral or lies at the interface of two minerals, typically in a radial arrangement; a reaction rim.
A series of sonnets linked together such that the last word of each is the first word of the next.
The crown of a crinoid, consisting of a cuplike central body (theca) and a set of arms.
To surround with a luminous or crownlike ring like the solar corona.
Stalactites and stalagmites collectively.
A protective moulding over a door or window that allows rain to drip away from the structure.
A water filter in which impurities are removed by running water through a porous stone.