positrino

noun

pos·​i·​tri·​no

ˌpäzə‧ˈtrē(ˌ)nō

plural -s

: a hypothetical atomic particle similar to the neutrino and having an immeasurably small mass and a positive charge

Word History

Etymology

positron + -ino (as in neutrino)

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now