An Etymological Dictionary of Astronomy and Astrophysics

Prefix denoting “equal; homogeneous; uniform.” Also is- sometimes before a vowel.

Etymology (EN): From L.L., from Gk. isos “equal.”

Etymology (PE): Izo-, loan from Gk. isos, as above. The Pers. ham-→ com- is overused; therefore this dictionary adopts izo-.