non·in·er·tial frame 
(nŏnĭ-nûr′shəl)
(nŏnĭ-nûr′shəl)n.
A frame of reference in which the observers are undergoing some accelerating force, such as gravity or a mechanical acceleration, for which Newton's laws of motion do not apply.
- Indo-European root: er-
- Indo-European root: er-
- Indo-European root: ers-
- Indo-European root: erə-
- Indo-European root: es-
- Indo-European root: (e)su-
- Indo-European root: eu-
- Indo-European root: euə-
- Indo-European root: euə-dh-r̥
- Indo-European root: gal-
- Indo-European root: gel-
- Indo-European root: gembh-
- Indo-European root: gemə-
- Indo-European root: genu-
- Indo-European root: genu-
- Indo-European root: genə-
- Indo-European root: ger-
- Indo-European root: gerbh-
- Indo-European root: gerə-
- Indo-European root: gerə-
- Indo-European root: geus-
- Indo-European root: ghabh-
- Indo-European root: ghans-
- Indo-European root: ghebh-el-
- Indo-European root: ghedh-