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instar

instar

2 9.9
A stage in an insect's life between two times it sheds its skin
  • noun
  • /ˈɪnˌstɑr/
  • Specialized
: instar
  • 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.
  • third instar
  • first instar
  • second instar

Examples

  • I have at least one adult instar... of the Judas breed at this location.

  • Starting out cream-colored (left), the third instar puts on additional weight and darkens (right).

    Academic text (2003)
  • This thing's already metamorphed into a new instar.

  • At the second instar, it is 0.8 inches long and has developed more prominent spines.

    Academic text (2006)
  • In about a week, the eggs hatch and develop into third-instar larvae.

    Academic text (1994)
  • There the larva passes through three more "instars," or developmental stages, growing larger all the while.

    Academic text (2003)
  • In Panama, Colwell and I collected more than fifty third-instar larvae, and he took them back with him to his lab in Canada.

    Academic text (2003)
  • "To effectively manage grasshoppers, you usually have to treat them by the fourth or fifth instar, before they can cause significant forage damage or lay eggs," Fisher says.

    Academic text (1996)
  • Like other arthropods, such as insects and crustaceans, trilobites had a rigid exoskeleton and grew by molting in stages, or instars, at periodic intervals throughout their lives.

    Academic text (1992)
  • After molting, the caterpillar enters the second instar stage, where it starts to grow noticeably.

Surface Forms

instar singular
instars plural

Etymology

Instar comes from a Latin word instar meaning 'in the likeness of' or 'equal to', and you can imagine an insect 'standing' in one form until it changes. So an instar is the stage an insect has between two molts.