WordNet

emit as rays; "That tower rays a laser beam for miles across the sky"
(mathematics) a straight line extending from a point
a branch of an umbel or an umbelliform inflorescence
any of the stiff bony spines in the fin of a fish
cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins
the 24th letter of the Roman alphabet (同)x, ex
electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target (同)X-ray, X-radiation, roentgen_ray

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Bartalena L1, Marcocci C, Tanda ML, Rocchi R, Mazzi B, Barbesino G, Pinchera A.
Thyroid : official journal of the American Thyroid Association.Thyroid.2002 Mar;12(3):245-50.
Orbital radiotherapy is a well-established method of treatment for severe Graves' ophthalmopathy, because of its anti-inflammatory and locally immunosuppressive effects. It has been used for 60 years. Conventional external x-ray and cobalt therapy have been abandoned, and most groups now use supervo
PMID 11952048

Brain metastasis from differentiated thyroid cancer in patients treated with radioiodine for bone and lung lesions.

Misaki T1, Iwata M, Kasagi K, Konishi J.
Annals of nuclear medicine.Ann Nucl Med.2000 Apr;14(2):111-4.
Brain metastasis of differentiated thyroid cancer (DTC) often is detected during treatment of other remote lesions. We examined the prevalence, risk factors and treatment outcome of this disease encountered during nuclear medicine practice. Of the 167 patients with metastasis to lung or bone treated
PMID 10830528

Orton CG1.
Health physics.Health Phys.1995 Nov;69(5):662-76.
Treatment of diseases with x rays began within months of Roentgen's discovery, and within four years x rays were being used successfully for the treatment of skin cancers. Deep-seated cancers began to be treated successfully in the 1920's with the advent of "deep" x-ray units and, especially, once s
PMID 7558860