F - Fer

Fet - Fi

Fl - Fre

Fro - Fv

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Frost Point: Term referring to lilac (lavender) point.

Full Tom: An unneutered male cat.

Fungicide: A chemical substance that destroys or inhibits the growth of fungi.

Fungus: A primitive form of plant life that can be parasitic.

FUS: Acronym for Feline Urological Syndrome. See FLUTD.

FVR: Acronym for Feline Viral Rhinotracheitis, a serious cause of feline respiratory diseases.