| 释义 |
Definition of ptyalin in English: ptyalinnoun ˈtʌɪəlɪnˈtaɪələn mass nounBiochemistry A form of amylase found in the saliva of humans and some other animals. 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: ptyalinnounˈtaɪələnˈtīələn Biochemistry A form of amylase found in the saliva of humans and some other animals. 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. |