10-letter words starting with o
- ochlagogue — (rare) A manipulator of a mob who holds sway by use of inflammatory rhetoric, casting opprobrium, and by appeal to the lowest common denominator generally; an extreme and wholly unscrupulous demagogue; one who practises ochlagogy.
- ochlocracy — government by the mob; mob rule; mobocracy.
- ochratoxin — a toxin produced by Aspergillus ochraceus and several other molds that commonly contaminate cereal grains: causes intestinal inflammation and kidney and liver degeneration when ingested by animals.
- ochronosis — An autosomal-recessive metabolic disorder that causes an excess of homogentisic acid, resulting in adverse pigmentation, calcification, and inflammation of cartilaginous and related tissue throughout the body.
- octachoron — (mathematics) A four-dimensional object equivalent to a cube, constructed out of sixteen cubes.
- octahedral — having the form of an octahedron.
- octahedron — a solid figure having eight faces.
- octamerous — consisting of or divided into eight parts.
- octameters — Plural form of octameter.
- octandrian — relating to the classification Octandria or those plants that have eight stamens
- octangular — having eight angles.
- octaploidy — the fact of having or containing eight groups or sets of chromosomes
- octavalent — having a valence of eight.
- octodecimo — a book size of about 4 × 6 1/4 inches (10 × 16 cm), determined by printing on sheets folded to form 18 leaves or 36 pages. Symbol: 18mo, 18°.
- octogenary — (obsolete) Of eighty years of age.
- octogynous — having eight pistils
- octomerous — octamerous.
- octonaries — Plural form of octonary.
- octoploids — Plural form of octoploid.
- octopusher — a person who plays octopush
- octothorpe — hash character
- octreotide — (pharmacy) An octapeptide that mimics natural somatostatin pharmacologically, though it is a more potent inhibitor of growth hormone, glucagon and insulin than the natural hormone.
- oculogyric — (medicine) Pertaining to the rotation of the eyeballs within their orbits.
- oculomotor — moving or tending to move the eyeball: an oculomotor muscle.
- oculonasal — Pertaining to the eyes and nose.
- odalisques — Plural form of odalisque.
- odd fellow — a member of a social and benevolent society that originated in England in the 18th century.
- odd-jobman — a person who does casual work, esp domestic repairs
- odd-lotter — a person who buys or sells odd lots.
- oddsmakers — Plural form of oddsmaker.
- odiousness — (uncountable) The condition of being odious.
- odontalgia — pain in a tooth; toothache.
- odontiasis — dentition (def 2).
- odontocete — any whale of the suborder Odontoceti, as dolphins, killer whales, and sperm whales, characterized by an asymmetrical skull, a single blowhole, and rows of teeth, feeding primarily on fish, squid, and crustaceans.
- odontogeny — the development of teeth.
- odontolite — bone turquoise.
- odontology — the science dealing with the study of the teeth and their surrounding tissues and with the prevention and cure of their diseases.
- odorimetry — the measurement of the strength and permanence of odours
- odoriphore — the group of atoms in an odorous molecule responsible for its odour
- odour-free — not having any particular or distinctive scent or smell
- oedematous — (British spelling) Alternative form of edematous.
- oenologist — Alternative spelling of enologist.
- oenophiles — Plural form of oenophile.
- oenophilia — a person who enjoys wines, usually as a connoisseur.
- oenophilic — a person who enjoys wines, usually as a connoisseur.
- oenophobia — The fear of wine; anxiety related to wine.
- oesophagus — (anatomy) The tube that carries food from the pharynx to the stomach.
- oestradiol — Alternative spelling of estradiol.
- of a piece — a separate or limited portion or quantity of something: a piece of land; a piece of chocolate.
- of a truth — certainly