Definition of instar in English:

instar

noun ˈɪnstɑːˈinstär

Zoology

A phase between two periods of moulting in the development of an insect larva or other invertebrate animal.
〔动〕（昆虫等无脊椎动物的）龄期
Example sentencesExamples
- When the eggs hatch, the caterpillar enters the first instar (stage of development).
- At the end of the third instar, the larva wriggles out of its warble, falls to the ground, and burrows into the soil to pupate.
- The larval stage consists of four phases, or instars, with a complete molt between each instar.
- The life cycle of most metamorphic insects includes several sequential larval instars followed by a molt to a pupa, and then a final molt to the adult.
- After the second moult, larvae preyed only on the first-instar nymphs of Libyaspis, while the larvae of later instars preyed on nymphs of a wide range of sizes.

Origin

Late 19th century: from Latin, literally 'form, likeness'.

Definition of instar in US English:

instar

nounˈinstär

Zoology

A phase between two periods of molting in the development of an insect larva or other invertebrate animal.
〔动〕（昆虫等无脊椎动物的）龄期
Example sentencesExamples
- The life cycle of most metamorphic insects includes several sequential larval instars followed by a molt to a pupa, and then a final molt to the adult.
- At the end of the third instar, the larva wriggles out of its warble, falls to the ground, and burrows into the soil to pupate.
- After the second moult, larvae preyed only on the first-instar nymphs of Libyaspis, while the larvae of later instars preyed on nymphs of a wide range of sizes.
- When the eggs hatch, the caterpillar enters the first instar (stage of development).
- The larval stage consists of four phases, or instars, with a complete molt between each instar.

Origin

Late 19th century: from Latin, literally ‘form, likeness’.

词汇	instar
释义	Definition of instar in English: instar noun ˈɪnstɑːˈinstär Zoology A phase between two periods of moulting in the development of an insect larva or other invertebrate animal. 〔动〕（昆虫等无脊椎动物的）龄期 Example sentencesExamples When the eggs hatch, the caterpillar enters the first instar (stage of development). At the end of the third instar, the larva wriggles out of its warble, falls to the ground, and burrows into the soil to pupate. The larval stage consists of four phases, or instars, with a complete molt between each instar. The life cycle of most metamorphic insects includes several sequential larval instars followed by a molt to a pupa, and then a final molt to the adult. After the second moult, larvae preyed only on the first-instar nymphs of Libyaspis, while the larvae of later instars preyed on nymphs of a wide range of sizes. Origin Late 19th century: from Latin, literally 'form, likeness'. Definition of instar in US English: instar nounˈinstär Zoology A phase between two periods of molting in the development of an insect larva or other invertebrate animal. 〔动〕（昆虫等无脊椎动物的）龄期 Example sentencesExamples The life cycle of most metamorphic insects includes several sequential larval instars followed by a molt to a pupa, and then a final molt to the adult. At the end of the third instar, the larva wriggles out of its warble, falls to the ground, and burrows into the soil to pupate. After the second moult, larvae preyed only on the first-instar nymphs of Libyaspis, while the larvae of later instars preyed on nymphs of a wide range of sizes. When the eggs hatch, the caterpillar enters the first instar (stage of development). The larval stage consists of four phases, or instars, with a complete molt between each instar. Origin Late 19th century: from Latin, literally ‘form, likeness’.
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