10-letter words containing r, o, t, h
- oglethorpe — James Edward, 1696–1785, British general: founder of the colony of Georgia.
- oireachtas — the parliament of the Republic of Ireland, consisting of the president, the Dail Eireann, and the Seanad Eireann.
- old growth — forest growth consisting of mature or overmature trees.
- old-growth — designating or of a forest characterized by very large, very old trees and great biodiversity
- on draught — Beer that is on draught is kept in and served from a barrel rather than a bottle.
- on the air — a mixture of nitrogen, oxygen, and minute amounts of other gases that surrounds the earth and forms its atmosphere.
- on the run — to go quickly by moving the legs more rapidly than at a walk and in such a manner that for an instant in each step all or both feet are off the ground.
- oophoritis — inflammation of an ovary, usually combined with an inflammation of the Fallopian tubes; ovaritis.
- ophiolater — a person who worships snakes
- ophiolatry — the worship of snakes.
- opotherapy — organotherapy.
- or another — You use or another in expressions such as one kind or another when you do not want to be precise about which of several alternatives or possibilities you are referring to.
- orchardist — a person who owns, manages, or cultivates an orchard.
- orchectomy — orchiectomy.
- orchestics — the art of dancing
- orchestral — of, relating to, or resembling an orchestra.
- orchestras — Plural form of orchestra.
- orchestric — relating to dancing
- orchiditis — inflammation of the testis.
- ore hearth — a small blast furnace for smelting lead.
- ornithopod — any herbivorous dinosaur of the suborder Ornithopoda whose members usually walked erect on their hind legs.
- ornithosis — psittacosis, especially of birds other than those of the parrot family.
- orthoboric — (chemistry) boric (especially when compared with other oxyacid species of boron).
- orthocaine — a methyl ester used for local anaesthesia
- orthoclase — a common white or pink mineral of the feldspar group, KAlSi 3 O 8 , having two good cleavages at right angles, and found in silica-rich igneous rocks: used in the manufacture of porcelain.
- orthodoxly — In a correct or proper way; conventionally; correctly. (from 17th c.).
- orthodrome — (geometry) a great circle, or part of one.
- orthodromy — a route or the navigation of a route which forms part of a large circle
- orthoepist — the study of correct pronunciation.
- orthogenic — Psychology. of, concerned with, or providing corrective treatment for mentally retarded or seriously disturbed children: orthogenic class.
- orthogonal — Mathematics. Also, orthographic. pertaining to or involving right angles or perpendiculars: an orthogonal projection. (of a system of real functions) defined so that the integral of the product of any two different functions is zero. (of a system of complex functions) defined so that the integral of the product of a function times the complex conjugate of any other function equals zero. (of two vectors) having an inner product equal to zero. (of a linear transformation) defined so that the length of a vector under the transformation equals the length of the original vector. (of a square matrix) defined so that its product with its transpose results in the identity matrix.
- orthograde — walking in an upright manner
- orthograph — An orthographic projection.
- orthometry — The art or practice of constructing verses correctly; the laws of correct poetry.
- orthopedic — of or relating to orthopedics.
- orthophoto — An aerial photograph that has been geometrically corrected (orthorectified) such that the scale of the photograph is uniform, meaning that the photo can be considered equivalent to a map.
- orthophyre — feldspar rock
- orthopneic — difficult or painful breathing except in an erect sitting or standing position.
- orthopnoea — difficult or painful breathing except in an erect sitting or standing position.
- orthopraxy — correctness or orthodoxy of action or practice.
- orthoprism — a prism which has faces parallel to its vertical axis
- orthoptera — Any of very many four-winged insects, of the order Orthoptera, such as grasshoppers, crickets and locusts.
- orthoptics — a method of exercising the eye and its muscles in order to cure strabismus or improve vision.
- orthoptist — One who practices orthoptics.
- orthorexia — (psychology) A fixation with healthy or righteous eating.
- orthorexic — Having a fixation with healthy or righteous eating.
- orthoscope — (formerly) an instrument for examining the internal structures of the eye through a layer of water that neutralizes the refraction of the cornea.
- orthostyle — (of columns) erected in a straight row.
- orthotonic — characterized by muscular rigidity
- orthotopic — (anatomy) in the normal position.