Cornus obliqua
— Noun
– English
~ shrub of eastern North America closely resembling silky cornel
Cydonia oblonga
— Noun
– English
~ small Asian tree with pinkish flowers and pear-shaped fruit; widely cultivated
Cotinus obovatus
— Noun
– English
~ shrubby tree of southern United States having large plumes of feathery flowers resembling puffs of smoke
camera obscura
— Noun
– English
~ a darkened enclosure in which images of outside objects are projected through a small aperture or lens onto a facing surface
Carcharhinus obscurus
— Noun
– English
~ relatively slender blue-grey shark; nearly worldwide in tropical and temperate waters
ceremonial occasion
— Noun
– English
~ a formal event performed on a special occasion; "a ceremony commemorating Pearl Harbor"
Cassia occidentalis
— Noun
– English
~ very leafy malodorous tropical weedy shrub whose seeds have been used as an adulterant for coffee; sometimes classified in genus Cassia
Cercis occidentalis
— Noun
– English
~ shrub of western United States having pink or crimson flowers; often forms thickets
Celtis occidentalis
— Noun
– English
~ large deciduous shade tree of southern United States with small deep purple berries
Calycanthus occidentalis
— Noun
– English
~ straggling aromatic shrub of southwestern United States having fragrant brown flowers
coronary occlusion
— Noun
– English
~ occlusion of a coronary artery caused either by progressive atherosclerosis or by a blood clot
co-occurrence
— Noun
– English
~ an event or situation that happens at the same time as or in connection with another
co-occurrence
— Noun
– English
~ the temporal property of two things happening at the same time; "the interval determining the coincidence gate is adjustable"
Clematis ochreleuca
— Noun
– English
~ shrubby clematis of the eastern United States having curly foliage
calcium octadecanoate
— Noun
– English
~ an insoluble calcium salt of stearic acid and palmitic acid; it is formed when soap is mixed with water that contains calcium ions and is the scum produced in regions of hard water
choral ode
— Noun
– English
~ ode sung by the chorus in classical Greek drama
Clifford Odets
— Noun
– English
~ United States playwright (1906-1963)
Cedrela odorata
— Noun
– English
~ tropical American tree yielding fragrant wood used especially for boxes
Cananga odorata
— Noun
– English
~ evergreen Asian tree with aromatic greenish-yellow flowers yielding a volatile oil; widely grown in the tropics as an ornamental