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fin

fin

2 4.1
A thin flat part on a machine that helps cool or guide air
  • noun
  • /fɪn/
translation icon : aleta
  • The heat exchanger has a special fin-and-tube design for maximum heat transfer efficiency.
  • cooling fins
  • locate fins

Different numbers of fins, size of fins, the width, the the curve.

Examples

  • It's a pretty big ship, so it may be necessary to have the fins this size.

    Blog text (11)
  • Then I added some fins to lower wind resistance.

  • This is an aerodynamic fin longer than a football field.

  • That's why heat sinks need fins and not just heat pipes.

  • It is less than a centimeter from the fins of the radiator.

  • The fins are spring-loaded.

  • The server used tower heat sinks, which consisted of vertical heat pipes cooled with a fin array.

    Academic text (2001)
  • Heat exchanging fins in the upper body maintain the plug stem packing at an acceptable sealing temperature during use in cryogenic conditions.

    Academic text (2004)
  • Using massive rear 20" x 24" cooling fins, the completely sealed K5 standard Pentium computer is perfect for hot, dirty, oily, dusty, wet installations.

    Academic text (1996)
  • The car was designed with sleek tail fins that improve aerodynamics.

Synonyms

vertical fin
vsfin
  • Specialized
1 4.3

A flat upright part on an airplane tail that keeps the plane pointing straight

is a general projecting part used on many objects for stability or airflow
tail fin
vsfin
  • Specialized
1 4.2

A vertical surface at the plane's tail that helps keep it steady in flight

is broader and applies to many projections beyond aircraft rear surfaces
ventral fin
vsfin
  • Specialized
6.7

A fin under a plane or rocket that helps keep it stable in flight

is used in many positions on objects not only under their bodies
fin keel
vsfin
  • Specialized
7.9

A metal piece under a boat that keeps it from moving sideways

is used across many objects for stability or airflow not only in water

Compounds

dorsal fin
  • Specialized
5 3.5

A fin on the back of a fish or dolphin that helps it keep balance while swimming

3 4.0

A large whale with a flat head, long body and small back fin found in the Atlantic and Pacific

pectoral fin
  • Specialized
1 6.1

A fin on each side of a fish near the head that helps it steer

fin de siècle
  • Literature
1 9.9

A period at the end of a century, especially the late 1800s, with a mood of decline

fin-de-siècle
  • Literature
1 9.9

About the end of a century, especially the late 19th century, showing cultural change and moral decline

tail fin
  • Archaic
1 6.4

A decorative metal piece on a car's rear that looks like a small wing

tail fin
  • Specialized
1 4.2

A vertical surface at the plane's tail that helps keep it steady in flight

vertical fin
  • Specialized
1 4.3

A flat upright part on an airplane tail that keeps the plane pointing straight

caudal fin
  • Specialized
6.0

A tail fin at the back of a fish that pushes water to make it move and steer

fin de siècle
  • Literature
9.9

Relating to the mood and art at the end of a century, often the late 1800s

fin keel
  • Specialized
7.9

A metal piece under a boat that keeps it from moving sideways

long-fin tunny
  • Specialized
7.0

A large tuna with long side fins often sold as canned fish

heterocercal fin
  • Specialized
9.9

A tail fin with a larger top than bottom and the backbone entering the top, like sharks

homocercal fin
  • Specialized
9.9

A tail fin that is the same on both sides and extends past the spine, seen in most bony fish

pelvic fin
  • Specialized
6.3

One of a pair of small fins on the lower body of a fish that help it steer

3.1

A flat fin at a fish's rear used to push and steer it in water

soup-fin
  • Specialized
9.9

A Pacific shark with fins used for Chinese soup and liver rich in vitamin A

ventral fin
  • Specialized
6.1

A fin under a fish that helps it balance and turn

ventral fin
  • Specialized
6.7

A fin under a plane or rocket that helps keep it stable in flight

Surface Forms

fin singular
fins plural

Etymology

Fin for a flat projecting part is named after the fish fin since it is a thin projection that controls water or air, so engineers use 'fins' to improve stability, cooling, or airflow.