strontium 90


strontium 90

noun

Definition of STRONTIUM 90

:  a heavy radioactive isotope of strontium of mass number 90 that has a half-life of 29 years, that is present in nuclear waste and fallout, and that is hazardous because like calcium it can be assimilated in biological processes and deposited in the bones of human beings and animals

First Known Use of STRONTIUM 90

1952

strontium 90

noun    (Medical Dictionary)

Medical Definition of STRONTIUM 90

: a heavy radioactive isotope of strontium having the mass number 90 that is present in the fallout from nuclear explosions and is hazardous because like calcium it can be assimilated in biological processes and deposited in the bones of human beings and animals—called also radiostrontium

Browse

Next Word in the Dictionary: strontium carbonate
Previous Word in the Dictionary: strontium
All Words Near: strontium 90

Seen & Heard

What made you want to look up strontium 90? Please tell us where you read or heard it (including the quote, if possible).