O
obliteration. Extinction.
official (in pharmacy). Authoritative; standard.
oid. Like, as in lymphoid, resembling or like lymph.
oil. A liquid of fatty consistency, insoluble in water and inflammable. Examples: camphorated oil, carbolic oil, carron oil, linseed oil, oil of turpentine, sweet oil, sesame oil, tar oil.
ointment. A soft, fatty, medicated mixture.
onychauxis. Enlargement of finger or of toe nails.
onychia. Inflammation of the matrix with suppuration and shedding of the nail.
onychocryptosis. Ingrowing toe-nail.
onycholysis. Loosening or shedding of the nails.
onychomalacia. Loss or absence of nail rigidity.
onychomycosis. Any parasitic disease of the nails.
onychophag. One whose habit it is to bite his finger-nails.
onychophagy. Nail-biting.
onychoptosis. Falling off of the nails.
onychorrhexis. Abnormal brittleness of the nails.
onyx. A finger nail or a toe nail.
onyxis. Ingrowing toe-nail.
opisthotonos. Spasmodic rigidity of the body in which the trunk is thrown backward and arched upward.
oral. Relating to the mouth.
organic. Pertaining to or having organs, exhibiting animal or vegetable characteristics.
orthoform. A white, odorless, crystalline powder; employed as a local anesthetic and antiseptic in burns, ulcers, etc.
orthopedics. That branch of surgery which treats of chronic diseases of the joints and spine and the correction of deformities. (See chiropodial orthopedics.)
os (plural ossa). Bone.
osis. Full of, as in tuberculosis, a specific disease caused by the presence of the bacillus tuberculosis.
osseous. Bony.
osmidrosis. Bromidrosis; the excretion of perspiration of a strong odor.
ossification. The formation of bone.
osteitis. Inflammation of bone.
osteoclast. A polynuclear cell concerned in the absorption of bone.
osteogenetic. The development and formation of bone.
osteoma. A bony tumor.
osteomalacia. Softening of the bone.
osteomyelitis. Inflammation of the bone marrow or of both marrow and bone.
ous. Full of, as in fibrous, full of or composed of fibres.
oxygen. A gaseous element, the most widely distributed. Essential to animal and plant life; symbol O.
ozone. A modified form of oxygen.