| 释义 |
Definition of pectoral fin in English: pectoral finnoun Zoology 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. Example sentencesExamples - Look at the shape and size of the dorsal fin, pectoral fins, and the caudal fin.
- Paired pectoral fins and a dorsal fin were present, and the caudal fin was asymmetrical with a large upper lobe.
- They have one caudal fin, one dorsal fin, two pelvic fins, one anal fin, and two pectoral fins.
- They have strong pectoral fins with spines that are serrated on the outer side.
- One of the fossil's most intriguing aspects is the large, paired spines on the shark's pectoral fins, the side fins used for steering.
Definition of pectoral fin in US English: pectoral finnoun Zoology 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. Example sentencesExamples - Paired pectoral fins and a dorsal fin were present, and the caudal fin was asymmetrical with a large upper lobe.
- One of the fossil's most intriguing aspects is the large, paired spines on the shark's pectoral fins, the side fins used for steering.
- They have strong pectoral fins with spines that are serrated on the outer side.
- They have one caudal fin, one dorsal fin, two pelvic fins, one anal fin, and two pectoral fins.
- Look at the shape and size of the dorsal fin, pectoral fins, and the caudal fin.
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