| ORTHICONS | • orthicons n. Plural of orthicon. • ORTHICON n. a kind of television camera tube. |
| ORTHOAXES | • ORTHOAXIS n. in crystallography, the orthodiagonal. |
| ORTHOAXIS | • ORTHOAXIS n. in crystallography, the orthodiagonal. |
| ORTHODOXY | • orthodoxy n. Correctness in doctrine and belief. • orthodoxy n. Conformity to established and accepted beliefs (usually of religions). • Orthodoxy prop.n. The Eastern Orthodox Church. |
| ORTHOEPIC | • orthoepic adj. Of or relating to orthoepy in its various senses… • ORTHOEPIC adj. relating to orthoepy, the study of correct pronunciation, also ORTHOEPICAL. |
| ORTHOPEDY | • orthopedy n. Archaic form of orthopedics. • ORTHOPEDY n. the art or process of curing deformities arising from (originally childhood) disease or injury, also ORTHOPAEDICS, ORTHOPAEDY, ORTHOPEDIA, ORTHOPEDICS. |
| ORTHOPODS | • orthopods n. Plural of orthopod. • ORTHOPOD n. (slang) an orthopaedic surgeon. |
| ORTHOPTER | • orthopter n. Any insect of the order Orthoptera. • orthopter n. Synonym of ornithopter. • ORTHOPTER n. a type of aircraft propelled with flapping wings. |
| ORTHOPTIC | • orthoptic adj. Relating to orthoptics, the study and treatment of muscular irregularities of the eye. • orthoptic n. (Geometry) The isoptic whose given angle is a right angle. • ORTHOPTIC adj. pertaining to correct vision. |
| ORTHOTICS | • orthotics n. (Medicine) The design, manufacture and installation of orthopedic appliances to support, straighten… • orthotics n. Plural of orthotic. • ORTHOTICS n. the branch of medicine that uses prosthetics to support weakened limbs. |
| ORTHOTIST | • orthotist n. A person who makes or fits orthotic devices. • ORTHOTIST n. one skilled in orthotics. |
| ORTHOTONE | • orthotone adj. (Grammar) Retaining the accent; not enclitic; said of certain indefinite pronouns and adverbs when used… • ORTHOTONE adj. taking an accent in certain positions but not in others, also ORTHOTONIC. • ORTHOTONE n. an orthotone word. |
| ORTHROSES | • ORTHROS n. (Greek) one of the Greek canonical hours. |