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pectoral fin

pectoral fin

1 6.1
A fin on each side of a fish near the head that helps it steer
  • noun
  • /ˈpɛktərəl fɪn/
  • Specialized
translation icon : aleta pectoral
  • They tickle each other's bellies with their own little pectoral fins.
  • large pectoral fins
  • long pectoral fins
  • dorsal and pectoral fins

Even the catfish have pectoral fins that have razor long steak knife sized defense systems.

Examples

  • Prominent, partially healed scars were observed above the insertion of the left pectoral fin of the 391 cm female (Fig. 2).

    Academic text (1994)
  • Holding the gaff in one hand, he reached down and took hold of the nearest pectoral fin.

    Academic text (1997)
  • I am swimming past his pectoral fin when I see the whale's huge eye rotate in my direction.

    Fiction book (2002)
  • Slightly heavier than water, they rely on their pectoral fins and large livers filled with oil to give them lift.

    Academic text (1994)
  • They'll nurse from the long teatlocated at the base of her pectoral fins.

  • A serrated knife was used for removing the fins and tail, and for cutting behind the head and gill slits and forward of the pectoral fin.

    Academic text (1997)
  • The little fish had a flattened head, a tapered body, and big pectoral fins used for steering through the water.

  • The cownose ray flaps its pectoral fins up and down like a bird to help it navigate in the ocean.

  • Slightly heavier than water, they rely on their pectoral fins to control their movement and lift while swimming.

Synonyms

fin
vspectoral fin
45 1.0

A flat part on a fish's body that helps it swim and stay balanced

is a specific side appendage behind the head used to steer

Surface Forms

pectoral fin singular
pectoral fins plural

Morphology

pectoral + fin

The meaning is directly compositional: 'pectoral' (pertaining to the chest) combined with 'fin' (swimming appendage) yields a fin located in the chest/side region of an animal. This anatomical noun–noun combination is predictable and cross-linguistically common, so a learner who knows both constituents can infer the MWE's meaning.

Etymology

Pectoral fin uses the word pectoral, meaning the 'chest', and the word fin, meaning a fish limb. These side fins sit just behind the head like little arms and help the fish steer and keep balance.