Definition of cephalon in English:

cephalon

noun ˈkɛfəlɒnˈsɛfəlɒn-lən

Zoology

(in some arthropods, especially trilobites) the region of the head, composed of fused segments.
Example sentencesExamples
- This specimen cannot be specifically identified because it lacks the cephalon and first thoracic segment.
- I assume that, as in Phacops and older trilobites, the cephalon bore one pair of antennae and three pairs of biramous limbs, and each thoracic segment a pair of limbs.
- Members of the Agnostina have only two segments between the cephalon and pygidium, and never have cephalic sutures.
- The anteriormost region was the cephalon and was constructed from segments that were commonly demarcated by lateral furrows in the glabella (the stomach capsule), but which were fused together.
- This problem is reflected in the ongoing uncertainty about the number of biramous appendages in the trilobite cephalon.

Origin

Late 19th century: from Greek kephalē 'head'.

Definition of cephalon in US English:

cephalon

noun-lən

Zoology

(in some arthropods, especially trilobites) the region of the head, composed of fused segments.
Example sentencesExamples
- Members of the Agnostina have only two segments between the cephalon and pygidium, and never have cephalic sutures.
- The anteriormost region was the cephalon and was constructed from segments that were commonly demarcated by lateral furrows in the glabella (the stomach capsule), but which were fused together.
- I assume that, as in Phacops and older trilobites, the cephalon bore one pair of antennae and three pairs of biramous limbs, and each thoracic segment a pair of limbs.
- This problem is reflected in the ongoing uncertainty about the number of biramous appendages in the trilobite cephalon.
- This specimen cannot be specifically identified because it lacks the cephalon and first thoracic segment.

Origin

Late 19th century: from Greek kephalē ‘head’.

单词	cephalon
释义	Definition of cephalon in English: cephalon noun ˈkɛfəlɒnˈsɛfəlɒn-lən Zoology (in some arthropods, especially trilobites) the region of the head, composed of fused segments. Example sentencesExamples This specimen cannot be specifically identified because it lacks the cephalon and first thoracic segment. I assume that, as in Phacops and older trilobites, the cephalon bore one pair of antennae and three pairs of biramous limbs, and each thoracic segment a pair of limbs. Members of the Agnostina have only two segments between the cephalon and pygidium, and never have cephalic sutures. The anteriormost region was the cephalon and was constructed from segments that were commonly demarcated by lateral furrows in the glabella (the stomach capsule), but which were fused together. This problem is reflected in the ongoing uncertainty about the number of biramous appendages in the trilobite cephalon. Origin Late 19th century: from Greek kephalē 'head'. Definition of cephalon in US English: cephalon noun-lən Zoology (in some arthropods, especially trilobites) the region of the head, composed of fused segments. Example sentencesExamples Members of the Agnostina have only two segments between the cephalon and pygidium, and never have cephalic sutures. The anteriormost region was the cephalon and was constructed from segments that were commonly demarcated by lateral furrows in the glabella (the stomach capsule), but which were fused together. I assume that, as in Phacops and older trilobites, the cephalon bore one pair of antennae and three pairs of biramous limbs, and each thoracic segment a pair of limbs. This problem is reflected in the ongoing uncertainty about the number of biramous appendages in the trilobite cephalon. This specimen cannot be specifically identified because it lacks the cephalon and first thoracic segment. Origin Late 19th century: from Greek kephalē ‘head’.
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