English dictionary of medical terms (62)
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- No:1220 - orthopaedic
(ortho- + Gr. pais child) pertaining to the correction of
deformities of the musculoskeletal system; pertaining to
- No:1221 - orthostatic
(ortho- + Gr. statikos causing to stand) pertaining to or caused by
- No:1222 - osmolality
the concentration of osmotically active particles in solution
expressed in terms of osmoles of solute per kilogram of solvent.
The osmolality is directly proportional to the colligative
properties of solutions; osmotic pressure, boiling point elevation,
freezing point depression, and vapour pressure lowering.
- No:1223 - osmolarity
the concentration of osmotically active particles expressed in
terms of osmoles of solute per litre of solution.
- No:1224 - osmotic
pertaining to or of the nature of osmosis (= the passage of pure
solvent from a solution of lesser to one of greater solute
concentration when the two solutions are separated by a membrane
which selectively prevents the passage of solute molecules, but is
permeable to the solvent).
- No:1225 - ossicle
(L. ossiculum) a small bone.
- No:1226 - ossification
(L. ossificatio) the formation of bone or of a bony substance; the
conversion of fibrous tissue or of cartilage into bone or a bony
- No:1227 - osteoarthritis
(osteo- + Gr. arthron joint + -itis) noninflammatory degenerative
joint disease occurring chiefly in older persons, characterized by
degeneration of the articular cartilage, hypertrophy of bone at the
margins, and changes in the synovial membrane. It is accompanied
by pain and stiffness, particularly after prolonged activity.
- No:1228 - osteodystrophy
defective bone formation.
- No:1229 - osteolysis
(osteo- + Gr. lysis dissolution) dissolution of bone; applied
especially to the removal or loss of the calcium of bone.
- No:1230 - osteomalacia
(osteo- + Gr. malakia softness) a condition marked by softening of
the bones (due to impaired mineralization, with excess accumulation
of osteoid), with pain, tenderness, muscular weakness, anorexia,
and loss of weight, resulting from deficiency of vitamin D and
- No:1231 - osteomyelitis
(osteo- + Gr. myelos marrow) inflammation of bone caused by a
pyogenic organism. It may remain localized or may spread through
the bone to involve the marrow, cortex, cancellous tissue, and
- No:1232 - osteoporosis
(osteo- + Gr. poros passage + -osis) reduction in the amount of
bone mass, leading to fractures after minimal trauma.
- No:1233 - osteotomy
(osteo- + Gr. temnein to cut) the surgical cutting of a bone.
- No:1234 - otitis
(ot- + -itis) inflammation of the ear, which may be marked by pain,
fever, abnormalities of hearing, hearing loss, tinnitus, and
- No:1235 - otorhinolaryngology
(oto- + Gr. rhis nose + larynx larynx + -logy) that branch of
medicine concerned with medical and surgical treatment of the head
and neck, including the ears, nose and throat.
- No:1236 - otorrhea
(oto- + Gr. rhoia to flow) a discharge from the ear, especially a
- No:1237 - otosclerosis
(oto- + Gr. sklrosis hardening) a pathological condition of the
bony labyrinth of the ear, in which there is formation of spongy
bone (otospongiosis), especially in front of and posterior to the
footplate of the stapes; it may cause bony ankylosis of the stapes,
resulting in conductive hearing loss. Cochlear otosclerosis may
also develop, resulting in sensorineural hearing loss.
- No:1238 - ototoxic
having a deleterious effect upon the eighth nerve, or upon the
organs of hearing and balance.
- No:1239 - ovarian
pertaining to an ovary or ovaries (= female gonad).
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