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Glite Dictionary
heterocercal fin

heterocercal fin

9.9
A tail fin with a larger top than bottom and the backbone entering the top, like sharks
  • noun
  • /ˌhɛtərəˈsɜrkəl fɪn/
  • Specialized
translation icon : aleta heterocercal
  • The shark’s heterocercal fin helps it maintain lift as it swims through the ocean.

Examples

  • A heterocercal fin is a distinguishing feature in the anatomy of many cartilaginous fish.

  • Fossil evidence shows that many ancient fish species had a heterocercal fin rather than the more balanced type seen today.

  • The shark has a prominent heterocercal fin.

  • Many species of fish possess heterocercal fins.

  • The shark’s heterocercal fin provides stability and maneuverability while swimming in the ocean.

  • Researchers studied the heterocercal fin of ancient fish to understand their evolutionary adaptations.

  • In many species, the size and shape of a heterocercal fin can indicate their swimming style and behavior.

Synonyms

caudal fin
vsheterocercal fin
  • Specialized
6.0

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

is a specific tail type with larger upper lobe and backbone extension
tail fin
vsheterocercal fin
3.1

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

is the specific form with unequal lobes and backbone extending into upper lobe

Antonyms

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

How Symmetrical

homocercal fin
  • Specialized
9.9
heterocercal fin
  • Specialized
9.9

Surface Forms

heterocercal fin singular
heterocercal fins plural

Morphology

heterocercal + fin

This is a straightforward adjective + noun composition: if a learner knows 'heterocercal' (a tail with unequal lobes) and 'fin' (a swimming appendage), the meaning 'a fin that is heterocercal' is directly derivable. The structure is fully compositional and follows basic English modification patterns, so it is transparent to learners who know the constituents.

Etymology

The noun heterocercal fin comes from Greek parts hetero- and -cercal, which mean 'different' and 'tail'. The phrase gives a simple image: a tail with a bigger top than bottom, so today heterocercal fin names the kind of tail, as in sharks, that helps the fish lift itself while it swims.