Definition of dorsal fin in English:

dorsal fin

noun

Zoology

An unpaired fin on the back of a fish or whale, e.g. the tall triangular fin of a shark or killer whale.
〔动〕（鱼或鲸的）背鳍
Example sentencesExamples
- They have one caudal fin, one dorsal fin, two pelvic fins, one anal fin, and two pectoral fins.
- They're bigger than dolphins and seals, smaller than other whales, have tall dorsal fins and are black and white.
- Thus, at this speed, the dorsal fin supplements the thrust produced by the oscillating pectoral and caudal fins.
- It has two dorsal fins and a caudal fin or tail like that of a shark.
- This is the pattern seen in the dorsal fins of fishes, in Dimetrodon and among iguanid lizards.

Definition of dorsal fin in US English:

dorsal fin

noun

Zoology

An unpaired fin on the back of a fish or whale, e.g. the tall triangular fin of a shark or killer whale.
〔动〕（鱼或鲸的）背鳍
Example sentencesExamples
- This is the pattern seen in the dorsal fins of fishes, in Dimetrodon and among iguanid lizards.
- They have one caudal fin, one dorsal fin, two pelvic fins, one anal fin, and two pectoral fins.
- Thus, at this speed, the dorsal fin supplements the thrust produced by the oscillating pectoral and caudal fins.
- They're bigger than dolphins and seals, smaller than other whales, have tall dorsal fins and are black and white.
- It has two dorsal fins and a caudal fin or tail like that of a shark.

词汇	dorsal fin
释义	Definition of dorsal fin in English: dorsal fin noun Zoology An unpaired fin on the back of a fish or whale, e.g. the tall triangular fin of a shark or killer whale. 〔动〕（鱼或鲸的）背鳍 Example sentencesExamples They have one caudal fin, one dorsal fin, two pelvic fins, one anal fin, and two pectoral fins. They're bigger than dolphins and seals, smaller than other whales, have tall dorsal fins and are black and white. Thus, at this speed, the dorsal fin supplements the thrust produced by the oscillating pectoral and caudal fins. It has two dorsal fins and a caudal fin or tail like that of a shark. This is the pattern seen in the dorsal fins of fishes, in Dimetrodon and among iguanid lizards. Definition of dorsal fin in US English: dorsal fin noun Zoology An unpaired fin on the back of a fish or whale, e.g. the tall triangular fin of a shark or killer whale. 〔动〕（鱼或鲸的）背鳍 Example sentencesExamples This is the pattern seen in the dorsal fins of fishes, in Dimetrodon and among iguanid lizards. They have one caudal fin, one dorsal fin, two pelvic fins, one anal fin, and two pectoral fins. Thus, at this speed, the dorsal fin supplements the thrust produced by the oscillating pectoral and caudal fins. They're bigger than dolphins and seals, smaller than other whales, have tall dorsal fins and are black and white. It has two dorsal fins and a caudal fin or tail like that of a shark.
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