| 释义 |
Definition of trigger hair in English: trigger hairnoun 1Zoology
(in a coelenterate) a filament at the mouth of a nematocyst which triggers the emission of the stinging hair when touched. Example sentencesExamples - At the narrow outer edge of the cnidocyte is a short trigger hair.
- When the trigger hair on the outside of a nematocyte is touched, a coiled thread tube inside the enclosed nematocyst is released.
2Botany
A bristle on the leaf of a Venus flytrap which triggers the closure of the leaf around an insect. Example sentencesExamples - The flytrap features a set of inch-long, heart-shaped capture leaves, each fringed with trigger hairs and bisected by a deep fold.
- The trap does not close every time a trigger hair is touched because a lot of energy would be used up this way.
- The first phase of the leaf closure begins when a trigger hair is disturbed.
- Darwin's investigation into the biology of the Venus flytrap involved testing the sensitivity of trigger hairs.
Definition of trigger hair in US English: trigger hairnoun 1Zoology
(in a coelenterate) a filament at the mouth of a nematocyst, triggering the emission of the stinging hair. Example sentencesExamples - At the narrow outer edge of the cnidocyte is a short trigger hair.
- When the trigger hair on the outside of a nematocyte is touched, a coiled thread tube inside the enclosed nematocyst is released.
2Botany
A bristle on the leaf of a Venus flytrap, triggering the closure of the leaf around an insect. Example sentencesExamples - Darwin's investigation into the biology of the Venus flytrap involved testing the sensitivity of trigger hairs.
- The first phase of the leaf closure begins when a trigger hair is disturbed.
- The flytrap features a set of inch-long, heart-shaped capture leaves, each fringed with trigger hairs and bisected by a deep fold.
- The trap does not close every time a trigger hair is touched because a lot of energy would be used up this way.
|