Definition of homocercal in English:

homocercal

adjective ˌhɒmə(ʊ)ˈsəːk(ə)lˌhəʊmə(ʊ)ˈsəːk(ə)lˌhōməˈsərk(ə)l

Zoology

(of a fish's tail) appearing outwardly symmetrical but with the backbone passing into the upper lobe, as in all higher fish.
Contrasted with diphycercal, heterocercal
Example sentencesExamples
- The current literature contains several hypotheses about the function of caudal fins of different shapes, and much of this discussion has focused on the difference between heterocercal and homocercal tails.
- The tail fin of most ray-finned fish, with the exception of sturgeons and paddlefish, is homocercal, nearly symmetrical about the midline.
- Generally, osteolepiforms have homocercal, or even trilobate, tail fins.
- This caudal fin structure contrasts with the externally symmetrical homocercal morphology present in most teleost fishes such as bluegill sunfish.
- Both mammals and reptiles returning to the sea developed quite workable homocercal tails in very short order.

Origin

Mid 19th century: from homo- 'same' + Greek kerkos 'tail' + -al.

Definition of homocercal in US English:

homocercal

adjectiveˌhōməˈsərk(ə)l

Zoology

(of a fish's tail) appearing outwardly symmetrical but with the backbone passing into the upper lobe, as in all higher fish.
Contrasted with diphycercal, heterocercal
Example sentencesExamples
- The current literature contains several hypotheses about the function of caudal fins of different shapes, and much of this discussion has focused on the difference between heterocercal and homocercal tails.
- Both mammals and reptiles returning to the sea developed quite workable homocercal tails in very short order.
- Generally, osteolepiforms have homocercal, or even trilobate, tail fins.
- The tail fin of most ray-finned fish, with the exception of sturgeons and paddlefish, is homocercal, nearly symmetrical about the midline.
- This caudal fin structure contrasts with the externally symmetrical homocercal morphology present in most teleost fishes such as bluegill sunfish.

Origin

Mid 19th century: from homo- ‘same’ + Greek kerkos ‘tail’ + -al.

单词	homocercal
释义	Definition of homocercal in English: homocercal adjective ˌhɒmə(ʊ)ˈsəːk(ə)lˌhəʊmə(ʊ)ˈsəːk(ə)lˌhōməˈsərk(ə)l Zoology (of a fish's tail) appearing outwardly symmetrical but with the backbone passing into the upper lobe, as in all higher fish. Contrasted with diphycercal, heterocercal Example sentencesExamples The current literature contains several hypotheses about the function of caudal fins of different shapes, and much of this discussion has focused on the difference between heterocercal and homocercal tails. The tail fin of most ray-finned fish, with the exception of sturgeons and paddlefish, is homocercal, nearly symmetrical about the midline. Generally, osteolepiforms have homocercal, or even trilobate, tail fins. This caudal fin structure contrasts with the externally symmetrical homocercal morphology present in most teleost fishes such as bluegill sunfish. Both mammals and reptiles returning to the sea developed quite workable homocercal tails in very short order. Origin Mid 19th century: from homo- 'same' + Greek kerkos 'tail' + -al. Definition of homocercal in US English: homocercal adjectiveˌhōməˈsərk(ə)l Zoology (of a fish's tail) appearing outwardly symmetrical but with the backbone passing into the upper lobe, as in all higher fish. Contrasted with diphycercal, heterocercal Example sentencesExamples The current literature contains several hypotheses about the function of caudal fins of different shapes, and much of this discussion has focused on the difference between heterocercal and homocercal tails. Both mammals and reptiles returning to the sea developed quite workable homocercal tails in very short order. Generally, osteolepiforms have homocercal, or even trilobate, tail fins. The tail fin of most ray-finned fish, with the exception of sturgeons and paddlefish, is homocercal, nearly symmetrical about the midline. This caudal fin structure contrasts with the externally symmetrical homocercal morphology present in most teleost fishes such as bluegill sunfish. Origin Mid 19th century: from homo- ‘same’ + Greek kerkos ‘tail’ + -al.
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