Medical Definition of spin label
: a chemical species (as a free radical or metal complex) that has an unpaired electron and that is introduced into a molecule so that the molecule can be investigated using electron spin resonance
incapable of being surmounted or overcome
Get Word of the Day daily email!
Love words? Need even more definitions?Merriam-Webster unabridged
Words at Play
Ask the Editors
- On Contractions of Multiple Words
- A Look at Uncommon Onomatopoeia
- Is Singular 'They' a Better Choice?