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fin. US English


fin US English

A flattened appendage on various parts of the body of many aquatic vertebrates and some invertebrates, including fish and cetaceans, used for propelling, steering, and balancing

ad fin. US English

At or near the end of a piece of writing

ray-fin US English

A fish belonging to the class Actinopterygii, to which most living bony fishes belong and which includes those having thin fins supported by slender dermal rays; an actinopterygian fish.

anal fin US English

An unpaired fin located on the underside of a fish posterior to the anus

fin keel US English

A boat’s keel shaped like an inverted dorsal fin

fin whale US English

Another term for finback.

tail fin US English

A fin at the posterior extremity of a fish’s body, typically continuous with the tail

adipose fin US English

A small, rayless, fleshy dorsal fin present in certain fishes, notably in the salmon family

ballast fin US English

A metal fin attached to the keel of a yacht, serving to ballast her and to enable her to sail closer to the wind.

caudal fin US English

Another term for tail fin.

cooling fin US English

(Chiefly in plural) any of several ridges or projections (usually forming an ordered array) which serve to dissipate heat from a device such as an engine or electronic equipment by increasing surface area.

dorsal fin US English

An unpaired fin on the back of a fish or whale, e.g., the tall triangular fin of a shark or killer whale

pelvic fin US English

Each of a pair of fins on the underside of a fish’s body, attached to the pelvic girdle and helping to control direction

ventral fin US English

another term for pelvic fin.

pectoral fin US English

Each of a pair of fins situated on either side just behind a fish’s head, helping to control the direction of movement during locomotion. They correspond to the forelimbs of other vertebrates

vertical fin US English

Any of the unpaired fins in the midline of a fish’s body, i.e., a dorsal, anal, or caudal fin

fin de siècle US English

Relating to or characteristic of the end of a century, especially the 19th century

fintech US English

Computer programs and other technology used to support or enable banking and financial services

lobe-finned fish US English

A fish of a largely extinct group having fleshy lobed fins, including the probable ancestors of the amphibians

fin ray in ray1 US English

Each of the long, slender bony protuberances supporting the fins of most bony fishes

yellowfin US English

A widely distributed, commercially important tuna that has yellow anal and dorsal fins