We found 2 dictionaries that define the word beta irons:

General (2 matching dictionaries)

1. beta irons: Merriam-Webster
2. beta irons: Collins English Dictionary

(Note: See beta_iron as well.)

Definitions from Wiktionary (beta iron) ▸ noun:  The paramagnetic form of alpha iron or ferrite. ▸ Also see beta_iron ▸ Words similar to beta irons ▸ Usage examples for beta irons ▸ Idioms related to beta irons ▸ Wikipedia articles (New!) ▸ Words that often appear near beta irons ▸ Rhymes of beta irons ▸ Invented words related to beta irons