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单词 cercaria
释义

Definition of cercaria in English:

cercaria

nounPlural cercariaesəːˈkɛːrɪəˌsərˈkerēə
Zoology
  • A free-swimming larval stage in which a parasitic fluke passes from an intermediate host (typically a snail) to another intermediate host or to the final vertebrate host.

    Example sentencesExamples
    • The larvae inside the snail host produce several thousands of cercariae.
    • Inside these slime balls are cercariae of the fluke, nicely encased in a ‘mini’ aquatic habitat, albeit a temporary one.
    • Once the cercaria enters the second intermediate host, it sheds its tail and becomes a metacercaria, which is little more than a miniature, but sexually immature, adult, that may, or may not, encyst.
    • Only the tadpoles that were exposed to cercariae developed deformities.
    • Tadpoles in ponds with snails pick up trematode larvae, called cercariae.

Origin

Mid 19th century: modern Latin, formed irregularly from Greek kerkos 'tail'.

 
 

Definition of cercaria in US English:

cercaria

nounˌsərˈkerēə
Zoology
  • A free-swimming larval stage in which a parasitic fluke passes from an intermediate host (typically a snail) to another intermediate host or to the final vertebrate host.

    Example sentencesExamples
    • Only the tadpoles that were exposed to cercariae developed deformities.
    • Tadpoles in ponds with snails pick up trematode larvae, called cercariae.
    • Inside these slime balls are cercariae of the fluke, nicely encased in a ‘mini’ aquatic habitat, albeit a temporary one.
    • The larvae inside the snail host produce several thousands of cercariae.
    • Once the cercaria enters the second intermediate host, it sheds its tail and becomes a metacercaria, which is little more than a miniature, but sexually immature, adult, that may, or may not, encyst.

Origin

Mid 19th century: modern Latin, formed irregularly from Greek kerkos ‘tail’.

 
 
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更新时间:2024/12/22 19:05:11