fin

PRIMARY MEANINGS OF: fin

1	n v	organ of locomotion and balance in fishes and some other aquatic animals propel oneself through the water in a finning motion
2	n	one of a set of parallel slats in a door or window to admit air and reject rain
3	n	one of a pair of decorations projecting above the rear fenders of an automobile
4	n	the cardinal number that is the sum of four and one

FULL DEFINITIONS OF: fin

Types:: show 6 types...; hide 6 types...; dorsal fin
unpaired median fin on the backs of fishes and some other aquatic vertebrates that help to maintain balance; pectoral fin
either of a pair of fins situated just behind the head in fishes that help control the direction of movement; pelvic fin, ventral fin
either of a pair of fins attached to the pelvic girdle in fishes that help control the direction of movement; correspond to hind limbs of a land vertebrate; caudal fin, tail fin
the tail of fishes and some other aquatic vertebrates; heterocercal fin
a tail fin with unequal lobes in which the vertebral column turns upward into the larger lobe as in sharks; homocercal fin
symmetrical tail fin extending beyond the end of the vertebral column as in most bony fishes

Type of:: appendage, extremity, member
an external body part that projects from the body

Type of:: shoe
footwear shaped to fit the foot (below the ankle) with a flexible upper of leather or plastic and a sole and heel of heavier material

Types:: vane
a fin attached to the tail of an arrow, bomb or missile in order to stabilize or guide it

“The sharks were finning near the surface”

Type of:: equip, fit, fit out, outfit
provide with (something) usually for a specific purpose

Synonyms:: 5, Little Phoebe, Phoebe, V, cinque, five, fivesome, pentad, quint, quintet, quintuplet

Type of:: digit, figure
one of the elements that collectively form a system of numeration

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