fin

¹fin

noun \ˈfin\

Definition of FIN

1

: an external membranous process of an aquatic animal (as a fish) used in propelling or guiding the body — see fish illustration

2

: something resembling a fin: as

a : hand, arm

b (1) : an appendage of a boat (as a submarine) (2) : an airfoil attached to an airplane for directional stability

c : flipper 1b

d : any of the projecting ribs on a radiator or an engine cylinder

— fin·like \-ˌlīk\ adjective

— finned \ˈfind\ adjective

Origin of FIN

Middle English finn, from Old English

First Known Use: before 12th century

Other Anatomy Terms

bilateral symmetry, carotid, cartilage, dorsal, entrails, prehensile, renal, solar plexus, supine, thoracic, ventral

Rhymes with FIN

bin, blin, chin, din, Finn, Fyn, gin, grin, Gwyn, hin, in, inn, kin, linn, Lynn, pin, shin, Shin, sin, skin, spin, thin, tin, twin, whin, win, wynn, yin, zin

²fin

verb

finnedfin·ning

Definition of FIN

transitive verb

: to equip with fins

intransitive verb

1

: to show the fins above the water

2

: to move through water propelled by fins

First Known Use of FIN

1933

³fin

noun

Definition of FIN

slang

: a 5-dollar bill

Origin of FIN

Yiddish finf five, from Middle High German, from Old High German — more at five

First Known Use: 1916

⁴fin

abbreviation

Definition of FIN

1

finance; financial

2

finish