radioiodine
/ˌreɪdɪəʊˈʌɪədiːn/noun
Any of the radioactive isotopes of iodine; especially iodine-131, an artificial isotope with a half-life for beta decay of about 8 days, which is widely used as a tracer (especially in investigating thyroid function) and for radiotherapy of the thyroid gland.
Origin
1930s; earliest use found in Journal of the American Chemical Society. From radio- + iodine.
- the weaker sex
- the weakest link
- the Web
- thewed
- the weight of the world
- the West
- the wheel of Fortune
- the whip hand
- the whole ball of wax
- the whole enchilada
- the whole nine yards
- the whole schmear
- the whole shooting match
- the Whore of Babylon
- the windows of the soul
- the wish is father to the thought
- the witching hour
- the Word (of God)
- the word on the street
- the work of ——
- the world and his wife
- the world is your oyster
- the world, the flesh, and the devil
- the worried well
- the worse for drink