| 释义 |
Definition of ratite in English: ratiteadjective ˈratʌɪtˈratīt Ornithology (of a bird) having a flat breastbone without a keel, and so unable to fly. Contrasted with carinate Example sentencesExamples - They may well have been native to Africa - just one link in a continuous chain of ratite species that circled Gondwana until it broke up.
- When the ratite birds first roamed Gondwana, they could walk from any of the places where they later dwelt, to any other.
- What aspect of the ratite genome accounts for the larger size relative to volant birds?
- Further data of the energetic cost of breeding for males and females of other ratite species would be valuable for testing that hypothesis.
- About 30 years ago, Joel Cracraft sketched out the central melodies of ratite evolution.
noun ˈratʌɪtˈratīt Ornithology Any of the mostly large, flightless birds with a ratite breastbone, i.e. the ostrich, rhea, emu, cassowary, and kiwi, together with the extinct moa and elephant bird. Example sentencesExamples - Living relatives of moa include the emus, ostrich, and kiwi, which are members of a bird group called ratites.
- Cassowaries are large ratites, and are among the largest birds in the world.
- They are found in mammals, turtles, squamates, and crocodilians, as well as a few bird taxa, particularly ratites and ducks.
- Moas were ratites, flightless birds considered the sister group of all other birds.
- Other ratites, the elephant bird of Madagascar and the moas of New Zealand, have been extinct for several centuries, probably as a result of human hunting.
- They belonged to a primitive group of birds known as ratites.
Origin Late 19th century: from Latin ratis 'raft' + -ite1. Definition of ratite in US English: ratiteadjectiveˈratīt Ornithology (of a bird) having a flat breastbone without a keel, and so unable to fly. Contrasted with carinate Example sentencesExamples - Further data of the energetic cost of breeding for males and females of other ratite species would be valuable for testing that hypothesis.
- They may well have been native to Africa - just one link in a continuous chain of ratite species that circled Gondwana until it broke up.
- About 30 years ago, Joel Cracraft sketched out the central melodies of ratite evolution.
- When the ratite birds first roamed Gondwana, they could walk from any of the places where they later dwelt, to any other.
- What aspect of the ratite genome accounts for the larger size relative to volant birds?
nounˈratīt Ornithology Any of the mostly large, flightless birds with a ratite breastbone, i.e. the ostrich, rhea, emu, cassowary, and kiwi, together with the extinct moa and elephant bird. Example sentencesExamples - They are found in mammals, turtles, squamates, and crocodilians, as well as a few bird taxa, particularly ratites and ducks.
- They belonged to a primitive group of birds known as ratites.
- Moas were ratites, flightless birds considered the sister group of all other birds.
- Other ratites, the elephant bird of Madagascar and the moas of New Zealand, have been extinct for several centuries, probably as a result of human hunting.
- Living relatives of moa include the emus, ostrich, and kiwi, which are members of a bird group called ratites.
- Cassowaries are large ratites, and are among the largest birds in the world.
Origin Late 19th century: from Latin ratis ‘raft’ + -ite. |