There are 2 definitions of Fm in English:

Fm1

Syllabification: Fm

symbol

The chemical element fermium.

Definition of Fm in:

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Word of the day antebellum
Pronunciation: ˌantɪˈbɛləm
adjective
occurring or existing before a particular war…

There are 2 definitions of Fm in English:

FM2

Syllabification: FM

abbreviation

Frequency modulation: [as adjective]: an FM radio station

Definition of Fm in: