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单词 triclad
释义

Definition of triclad in English:

triclad

noun ˈtrʌɪkladˈtrīklad
Zoology
  • A free-living flatworm of an order characterized by having a gut with three branches, including the planarians.

    〔动〕三肠目涡虫,真涡虫

    Order Tricladida, class Turbellaria

    Example sentencesExamples
    • We have searched for Hox and ParaHox genes in several flatworm groups spanning from freshwater triclads to marine polyclads and, more recently, in the acoels, the likely earliest extant bilaterian.
    • Despite several attempts, no ParaHox genes have so far been found in triclads.
    • We have isolated and sequenced eight Hox genes from the freshwater triclad Girardia tigrina and three Hox and two ParaHox genes from the polyclad Discocelis tigrina.
    • The amplified fragment of EF1a varies in size, from 947 nt in the two polyclads to 962 nt in C. roscoffensis to 965 nt in the three triclads.
    • The KKEE motif shared between Convoluta and the triclads either is due to convergence or is an artefact of imposed positional homology in the alignment of Berney, Pawloski, and Zaninetti.
    • In fact, there are only two authenticated cases of passive dispersal in freshwater triclads.

Origin

Late 19th century: from modern Latin Tricladida, from tri- 'three' + Greek klados 'branch'.

Definition of triclad in US English:

triclad

nounˈtrīklad
Zoology
  • A free-living flatworm of an order characterized by having a gut with three branches, including the planarians.

    〔动〕三肠目涡虫,真涡虫

    Order Tricladida, class Turbellaria

    Example sentencesExamples
    • In fact, there are only two authenticated cases of passive dispersal in freshwater triclads.
    • The KKEE motif shared between Convoluta and the triclads either is due to convergence or is an artefact of imposed positional homology in the alignment of Berney, Pawloski, and Zaninetti.
    • The amplified fragment of EF1a varies in size, from 947 nt in the two polyclads to 962 nt in C. roscoffensis to 965 nt in the three triclads.
    • We have searched for Hox and ParaHox genes in several flatworm groups spanning from freshwater triclads to marine polyclads and, more recently, in the acoels, the likely earliest extant bilaterian.
    • Despite several attempts, no ParaHox genes have so far been found in triclads.
    • We have isolated and sequenced eight Hox genes from the freshwater triclad Girardia tigrina and three Hox and two ParaHox genes from the polyclad Discocelis tigrina.

Origin

Late 19th century: from modern Latin Tricladida, from tri- ‘three’ + Greek klados ‘branch’.

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更新时间:2024/12/27 13:57:12