F - Fer

Fet - Fi

Fl - Fre

Fro - Fv

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Fat: Any of various soft, solid, or semisolid organic compounds constituting the esters of glycerol and fatty acids and their associated organic groups.

FCV: Acronym for Feline Calcivirus, a virus that causes upper respiratory disease

Feline: Of or belonging to the family Felidae, which includes the lions, tigers, jaguars, and wild and domestic cats; felid.

Feline Immunodeficiency Virus: A virus which invades a cat's DNA and ultimately causes dysfunction of the immune system.

Feline Leukemia Virus: A group of diseases commonly causing cancer and death.

FeLV: See Feline Leukemia Virus

Feral: Having returned to an untamed state from domestication.

Feral-Domestic Hybrid: A hybrid between a wild cat species and a domestic cat.