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词汇 sycon
释义

Definition of sycon in English:

sycon

noun ˈsʌɪkɒnˈsīkän
Zoology
  • A sponge of a grade of structure showing some folding of the body wall, with choanocytes only lining radial canals.

    〔动〕樽海绵属。比较ASCON 和LEUCON

    Compare with ascon and leucon
    Example sentencesExamples
    • Sycons are quick enough at regenerating to cope, I have a few different species on the way too that would probably be suitable, I might try and culture some.
    • Ascon, sycon, and leucon are levels of complexity that grade one into the other.
    • In the tide-pools all four calcareous sponges occur in quantity, and under heavy masses of weed both the Sycons are equally abundant.

Derivatives

  • syconoid

  • adjective
    Zoology
    • Sponges have three body types: asconoid, syconoid, and leuconoid.
      Example sentencesExamples
      • It is the only class with asconoid and syconoid construction, and has sponges with leuconoid construction as well.
      • Glass sponges most closely resemble syconoid sponges, but they differ too much internally from other sponges to be considered truly syconoid.
      • The term ostia is used to mean the openings into the pores of asconoid sponges, and the openings into the canals of syconoid and leuconoid sponges.
      • Many calcareous sponges have a syconoid plan of construction.
      • Larvae from all the sponges he examined (asconoid, syconoid and leuconoid) are depicted the same way, with two cell layers (the outer ciliated, the inner not), a hollow center, and an opening at one end.

Origin

Late 19th century: adopted as a genus name from Greek sukon 'fig'.

Definition of sycon in US English:

sycon

nounˈsīkän
Zoology
  • A sponge of intermediate structure, showing some folding of the body wall with choanocytes lining only radial canals.

    〔动〕樽海绵属。比较ASCON 和LEUCON

    Compare with ascon and leucon
    Example sentencesExamples
    • Sycons are quick enough at regenerating to cope, I have a few different species on the way too that would probably be suitable, I might try and culture some.
    • In the tide-pools all four calcareous sponges occur in quantity, and under heavy masses of weed both the Sycons are equally abundant.
    • Ascon, sycon, and leucon are levels of complexity that grade one into the other.

Origin

Late 19th century: adopted as a genus name from Greek sukon ‘fig’.

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