common bile duct a duct formed by the hepatic and cystic ducts
common burdock a plant that is ubiquitous in all but very acid soil
common lettuce annual or perennial garden plant having succulent leaves used in salads; widely grown
common polypody mat-forming lithophytic or terrestrial fern with creeping rootstocks and large pinnatifid fronds found throughout North America and Europe and Africa and east Asia
Commonwealth Day British, anniversary of Queen Victoria's birth
common bird cherry small European cherry tree closely resembling the American chokecherry
common white dogwood deciduous tree
common apricot temperate zone tree bearing downy yellow to rosy fruits
common yellowthroat an American warbler
common milkwort small European perennial with numerous branches having racemes of blue, pink or white flowers; formerly reputed to promote human lactation
conduct the way a person behaves toward other people
common duckweed of temperate regions except eastern Asia and Australia
commonplace completely ordinary and unremarkable
common birch European birch with silvery white peeling bark and markedly drooping branches
common lilac large European lilac naturalized in North America having heart-shaped ovate leaves and large panicles of highly fragrant lilac or white flowers
common beech large European beech with minutely-toothed leaves
common beet biennial Eurasian plant usually having a swollen edible root
common European dogwood European deciduous shrub turning red in autumn having dull white flowers
common buttercup perennial Old World buttercup with golden to sulphur yellow flowers in late spring to early summer; naturalized in North America
commonwealth a political system in which power lies in a body of citizens