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词汇 ptyalin
释义

Definition of ptyalin in English:

ptyalin

noun ˈtʌɪəlɪnˈtaɪələn
mass nounBiochemistry

  • A form of amylase found in the saliva of humans and some other animals.

    〔生化〕唾液淀粉酶

    Example sentencesExamples
    • It begins in the mouth where the enzyme ptyalin, present in saliva, begins to break down starch in food to sugars.
    • The saliva of carnivora contains no ptyalin and cannot predigest starches; that of vegetarian animals contains ptyalin for the predigestion of starches.

Origin

Mid 19th century: from Greek ptualon 'spittle' + -in1.

Definition of ptyalin in US English:

ptyalin

nounˈtaɪələnˈtīələn
Biochemistry

  • A form of amylase found in the saliva of humans and some other animals.

    〔生化〕唾液淀粉酶

    Example sentencesExamples
    • It begins in the mouth where the enzyme ptyalin, present in saliva, begins to break down starch in food to sugars.
    • The saliva of carnivora contains no ptyalin and cannot predigest starches; that of vegetarian animals contains ptyalin for the predigestion of starches.

Origin

Mid 19th century: from Greek ptualon ‘spittle’ + -in.
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