What's the difference between rare and unusual?

Rare


Definition:

  • (a.) Early.
  • (superl.) Nearly raw; partially cooked; not thoroughly cooked; underdone; as, rare beef or mutton.
  • (superl.) Not frequent; seldom met with or occurring; unusual; as, a rare event.
  • (superl.) Of an uncommon nature; unusually excellent; valuable to a degree seldom found.
  • (superl.) Thinly scattered; dispersed.
  • (superl.) Characterized by wide separation of parts; of loose texture; not thick or dense; thin; as, a rare atmosphere at high elevations.

Example Sentences:

  • (1) Guillain BarrĂ© syndrome following herpes zoster is rare and only 25 cases have been reported to date.
  • (2) Hypothyroidism complicated by spontaneous hyperthyroidism is an interesting but rare occurrence in the spectrum of autoimmune thyroid disorders.
  • (3) Oculomotor paresis with cyclic spasms is a rare syndrome, usually noticeable at birth or developing during the first year of life.
  • (4) The frequency of rare fragile sites was studied among 240 children in special schools for subnormal intelligence (IQ 52-85).
  • (5) Surgical repair of the rheumatologic should however, is performed rarely, and should be reserved for the infrequent cases that do not respond to medical therapy.
  • (6) Cor triatriatum (CT) is a rare congenital defect, surgically correctable, and sometimes difficult to diagnose by cardiac catheterization.
  • (7) During this period he developed autoimmune haemolytic anaemia, a rare complication of myelofibrosis.
  • (8) One rare case of blind-ending branch originating in the upper third of the ureter are described.
  • (9) This analysis demonstrated that more than 75% of cosmids containing a rare restriction site also contained a second rare restriction site, suggesting a high degree of CpG-rich restriction site clustering.
  • (10) These are rare tumours comparable to abdominal desmoid tumours.
  • (11) They can rarely be detected spontaneously but most often are provoked.
  • (12) A rare case of an extradural brucellosis granuloma in the thoracic region is presented.
  • (13) Massive osteoplastic bone tumor in hepatocellular carcinoma is very rare.
  • (14) Aneurysmal bone cyst is an uncommon benign lesion that rarely presents in the craniofacial region.
  • (15) Axons emerge from proximal dendrites within 50 microns of the soma, and more rarely from the soma, in a tapering initial segment, commonly interrupted by one or two large swellings.
  • (16) Useful studies on the relationship between these acute lesions and peptic ulceration are rare.
  • (17) calcium tung-state, rare-earths compounds, double halogenides.
  • (18) Spontaneous reports of suspected adverse reactions may be the only way of revealing very rare events but they present great difficulties of rational interpretation.
  • (19) Metastatic tumors of the small bowel from extra-abdominal sites are rare.
  • (20) Perinephric abscess is a rare condition; it may be acute, but can take a chronic and atypical course as a result of incomplete treatment with antibiotics.

Unusual


Definition:

  • (a.) Not usual; uncommon; rare; as, an unusual season; a person of unusual grace or erudition.

Example Sentences:

  • (1) "We examined the reachability of social networking sites from our measurement infrastructure within Turkey, and found nothing unusual.
  • (2) The clinical and radiologic characteristics of this unusual tumor are discussed.
  • (3) A diplomatic source said the killing appeared particularly unusual because of Farooq lack of recent political activity: "He was lying low in the past two years.
  • (4) The article describes an unusual case with development of a right anterior mediastinal mass after bypass surgery with internal mammary artery grafts.
  • (5) A marked overlap of input from the two eyes is an unusual feature for a diprotodont marsupial and has previously been seen only in the feathertail glider.
  • (6) Brain damage may be followed by a number of dynamic events including reactive synaptogenesis, rerouting of axons to unusual locations and altered axon retraction processes.
  • (7) HCECs display an unusual combination of cytokeratin IFs and neurofilaments, together with vimentin, and are heterogeneous with respect to their IF makeup.
  • (8) This unusual insertion could affect the interaction of cat CD4 with class II molecules, or with FIV, a feline homolog of HIV.
  • (9) Unusually high cooperativity, specificity, and multiplicity in the protein kinase C-phospholipid interaction are demonstrated by examining the lipid dependence of enzymatic activity.
  • (10) GlaxoSmithKline was unusually critical of the decision by Nice, the National Institute for Health and Clinical Excellence, and also the Scottish Medicines Consortium, to reject its drug belimumab (brand name Benlysta) in final draft guidance.
  • (11) These unusual fractures are not easily detected on the routine three-view "hand-series."
  • (12) Caulobacter flagella are unusual in that they contain two different flagellin subunits.
  • (13) The appearance of unusual isoenzyme patterns in newborn infants and in pregnant women in comparison with normal adults.
  • (14) This case is unusual in that it demonstrated no malignant epithelium beyond that of a borderline tumor, but met the criteria of malignancy because of its invasiveness and metastasis.
  • (15) A 6.4 kilobase C4B-5'-specific Taq I fragment usually provided a reliable guide to the presence of a C4A deletion but unusually in one instance this fragment was found to be a marker of a functioning C4A gene.
  • (16) Clinicians should be aware of this new and unusual association of a cerebral glioma and acquired immune deficiency syndrome.
  • (17) However, it does not and we therefore propose the presence of an unusual DNA conformation in these regions.
  • (18) An unusually high degree of motional freedom is found for both these spin-labels, even in gel phase bilayers.
  • (19) An unusual case of myopathy due to lipid storage in Type I muscle fibers is described.
  • (20) The model electron density map, calculated to a resolution of approximately 35 A, shows an unusually high protein content in the membranes.