Definition of ctenidium in English:

ctenidium

nounPlural ctenidia tɪˈnɪdɪəmtəˈnidēəm

Zoology

A comblike structure, especially a respiratory organ or gill in a mollusc, consisting of an axis with a row of projecting filaments.
〔动〕（软体动物的）栉鳃
Example sentencesExamples
- No ctenidia are present, and gas exchange is through the mantle surface.
- Polyplacophorans have six to 88 pairs of bipectinate ctenidia, the number of which is typically not species specific, increasing as the individual grows.
- Chaetoderms lack pedal grooves, have ctenidia paired in a small posterior mantle cavity, have a cuticular shield around the mouth and the stomach and digestive glands are separate.
- All cephalopods have one pair of unciliated ctenidia within the mantle cavity, with the exception of Nautilus, which has two pairs of ctenidia.
- Meanwhile, Pelseneer had come up with a classification of bivalves based on the structure of the ctenidia.

Origin

Late 19th century; modern Latin, from Greek ktenidion, diminutive of kteis, kten- 'comb'.

Definition of ctenidium in US English:

ctenidium

nountəˈnidēəm

Zoology

A comblike structure, especially a respiratory organ or gill in a mollusk, consisting of an axis with a row of projecting filaments.
〔动〕（软体动物的）栉鳃
Example sentencesExamples
- Chaetoderms lack pedal grooves, have ctenidia paired in a small posterior mantle cavity, have a cuticular shield around the mouth and the stomach and digestive glands are separate.
- Meanwhile, Pelseneer had come up with a classification of bivalves based on the structure of the ctenidia.
- No ctenidia are present, and gas exchange is through the mantle surface.
- All cephalopods have one pair of unciliated ctenidia within the mantle cavity, with the exception of Nautilus, which has two pairs of ctenidia.
- Polyplacophorans have six to 88 pairs of bipectinate ctenidia, the number of which is typically not species specific, increasing as the individual grows.

Origin

Late 19th century; modern Latin, from Greek ktenidion, diminutive of kteis, kten- ‘comb’.

词汇	ctenidium
释义	Definition of ctenidium in English: ctenidium nounPlural ctenidia tɪˈnɪdɪəmtəˈnidēəm Zoology A comblike structure, especially a respiratory organ or gill in a mollusc, consisting of an axis with a row of projecting filaments. 〔动〕（软体动物的）栉鳃 Example sentencesExamples No ctenidia are present, and gas exchange is through the mantle surface. Polyplacophorans have six to 88 pairs of bipectinate ctenidia, the number of which is typically not species specific, increasing as the individual grows. Chaetoderms lack pedal grooves, have ctenidia paired in a small posterior mantle cavity, have a cuticular shield around the mouth and the stomach and digestive glands are separate. All cephalopods have one pair of unciliated ctenidia within the mantle cavity, with the exception of Nautilus, which has two pairs of ctenidia. Meanwhile, Pelseneer had come up with a classification of bivalves based on the structure of the ctenidia. Origin Late 19th century; modern Latin, from Greek ktenidion, diminutive of kteis, kten- 'comb'. Definition of ctenidium in US English: ctenidium nountəˈnidēəm Zoology A comblike structure, especially a respiratory organ or gill in a mollusk, consisting of an axis with a row of projecting filaments. 〔动〕（软体动物的）栉鳃 Example sentencesExamples Chaetoderms lack pedal grooves, have ctenidia paired in a small posterior mantle cavity, have a cuticular shield around the mouth and the stomach and digestive glands are separate. Meanwhile, Pelseneer had come up with a classification of bivalves based on the structure of the ctenidia. No ctenidia are present, and gas exchange is through the mantle surface. All cephalopods have one pair of unciliated ctenidia within the mantle cavity, with the exception of Nautilus, which has two pairs of ctenidia. Polyplacophorans have six to 88 pairs of bipectinate ctenidia, the number of which is typically not species specific, increasing as the individual grows. Origin Late 19th century; modern Latin, from Greek ktenidion, diminutive of kteis, kten- ‘comb’.
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