• Any of the many small fluid-filled sacs located at the point where a muscle or tendon slides across bone. These sacs serve to reduce friction between the two moving surfaces.
• The duct in reptiles, amphibians and birds, as well as most fish and some mammals, which serves as the common outlet for urination, defecation, and reproduction.
• An outhouse or lavatory.
• A duct through which gangrenous material escapes a body.
• A cloud of dust surrounding the nucleus of a comet.
• A defect characterized by diffuse, pear-shaped images that in an ideal image would appear as points.
• A tuft or bunch, such as the assemblage of branches forming the head of a tree, a cluster of bracts when empty and terminating the inflorescence of a plant, or a tuft of long hairs on certain seeds.
• The luminous plasma atmosphere of the Sun or other star, extending millions of kilometres into space, most easily seen during a total solar eclipse.
• 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.
• (by extension) Any luminous or crownlike ring around an object or person.
• A luminous appearance caused by corona discharge, often seen as a bluish glow in the air adjacent to pointed metal conductors carrying high voltages.
• The large, flat, projecting member of a cornice which crowns the entablature, situated above the bed moulding and below the cymatium.
• A large, round pendent chandelier, with spikes around its upper rim to hold candles or lamps, usually hung from the roof of a church.
• A crown or garland bestowed among the Romans as a reward for distinguished services.
• Any appendage of an organism that resembles a crown or corona.
• An upper or crownlike portion of certain parts of the body.
• A manifestation of secondary syphilis, consisting of papular lesions along the hairline, often bordering the scalp in the manner of a crown.
• 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.
• 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.
Note: This list has been curated by our developer and author and fine-tuned since 2016 with manual additions, exclusions and rankings. Thousands of user contributions from rappers, singers, songwriters and poets have also been used for accuracy.