orpine
— Noun
– English
～ perennial northern temperate plant with toothed leaves and heads of small purplish-white flowers
Orpington
— Noun
– English
～ English breed of large chickens with white skin
orr
— Noun
– English
～ Canadian hockey player (born 1948)
orrery
— Noun
– English
～ planetarium consisting of an apparatus that illustrates the relative positions and motions of bodies in the solar system by rotation and revolution of balls moved by wheelwork; sometimes incorporated in a clock
orris
— Noun
– English
～ German iris having large white flowers with lavender-tinged falls and a fragrant rhizome
orris
— Noun
– English
～ fragrant rootstock of various irises especially Florentine iris; used in perfumes and medicines
orrisroot
— Noun
– English
～ fragrant rootstock of various irises especially Florentine iris; used in perfumes and medicines
Ortega
— Noun
– English
～ Nicaraguan statesman (born in 1945)
orthicon
— Noun
– English
～ a now obsolete picture pickup tube in a television camera; electrons emitted from a photoemissive surface in proportion to the intensity of the incident light are focused onto the target causing secondary emission of electrons
Orthilia
— Noun
– English
～ a shrubby perennial rhizomatous evergreen herb; grows in damp coniferous woodlands in northern temperate regions
orthoboric acid
— Noun
– English
～ a white or colorless slightly acid solid that is soluble in water and ethanol; used in the manufacture of glass and paper and adhesives and in detergents and as a flux in welding; also used as an antiseptic and food preservative
orthochorea
— Noun
– English
～ a form of chorea in which spasms occur mainly when the patient is erect
orthochromatic film
— Noun
– English
～ a photographic film sensitive to green and blue and violet light
orthoclase
— Noun
– English
～ a white or colored monoclinic feldspar
orthodontia
— Noun
– English
～ the branch of dentistry dealing with the prevention or correction of irregularities of the teeth
orthodontic braces
— Noun
– English
～ an appliance that corrects dental irregularities
orthodontics
— Noun
– English
～ the branch of dentistry dealing with the prevention or correction of irregularities of the teeth
orthodontist
— Noun
– English
～ a dentist specializing in the prevention or correction of irregularities of the teeth
orthodonture
— Noun
– English
～ the branch of dentistry dealing with the prevention or correction of irregularities of the teeth