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Imaginal disc

Definition of the noun Imaginal disc

What does Imaginal disc mean as a name of something?


  1. [biology] Any of several pairs of discs within the body of a larva that become part of the outside during pupal transformation


Imaginal disc: An imaginal disc is one of the parts of a holometabolous insect larva that will become a portion of the outside of the adult insect during the pupal transformation. Contained within the body of the larva, there are pairs of discs that will form, for instance, the wings or legs or antennae or other structures in the adult. The role of the imaginal disc in insect development was first elucidated by Jan Swammerdam.

Printed dictionaries and other books with definitions for Imaginal disc

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Google previewEncyclopedia of Insects (2009)

by Vincent H. Resh, Ring T. Cardé

It is likely that late-developing imaginal discs are the more ancestral condition and that early-developing discs are the more derived condition within the Holometabola. The morphology of imaginal discs also varies. The prototypical imaginal disc is a pocket or sack of cells that has invaginated from the larval epidermis, and is destined to form part or all of an adult appendage, compound eye, or genitalia. This sack evaginates (“everts”) during metamorphosis and contributes to the adult ...

Google previewStems Cells and Tissue Homeostasis (1978)

by B. I. Lord, C. S. Potten, R. J. Cole

Developmental homeostasis An imaginal disc is a closed system in that, once the founder ...

Google previewMechanisms of Morphogenesis (2005)

by Jamie Davies

The leg imaginal disc is a typical epithelium in that it consists of a sheet of cells linked to each other by adherens junctions towards the apical end of the cell and linked to a basement membrane by integrin-containing junctions on the basal surface. Both the adherens cell-cell junctions and the integrin cell-matrix junctions are associated with large arrays of actin microfilaments.36 Early in the development of a disc, the morphology of the epithelial cells is unremarkable. As the disc ...

Google previewIllustrated Dictionary of Entomology (2007)

by Paras Nath

Imaginal buds: See imaginal disc. Imaginal disc or bud: Latent adult structures in an immature insect, visible as groups of undifferentiated cells; mass of cells that persist in an undifferentiated state throughout the larval instars and become adult tissues (Fig. 146); a group of cells set aside in the embryo and maintained through the larval stage as a center of development of adult structures. Imago (pl. imagoes or imagines): The adult sexually mature form of an insect. Immature stage: Any ...

Google previewDictionary of Entomology, Plant Pathology and Nematology (1998)

by O. P. Singh, S. K. Srivastava

Imaginal disc.: Clusters of cells which undergo rapid division to form the rudiments of future organs during metamorphosis ...

Google previewEncyclopaedic Dictionary of Biotechnology (2005)

Imaginal disc : A mass of cells in the larvae of Drosophila melanogaster and other holometabolous insects that gives rise to particular adult organs, such as antennae, eyes or wings. Imaging : Procedures that produce pictures of areas inside the body. Imago : An adult insect. Imbibition : 1 )The absorption of liquids or vapours into the ultramicroscopic spaces or pores found in materials. 2) The initial water uptake by seeds prior to germination. Imbricate : Overlapping in regular order, ...

Google previewA Dictionary of Biology (2017)

by M. Abercrombie

IMAGINAL DISC. Thickening of epidermis, together with underlying mesenchyme , in pupa of holometabolous insect which at metamorphosis gives rise to an adult organ, the larval structure being destroyed. IMAGo. Adult sexually mature insect. IMB RICATE. (Of leaves, petals, etc.), overlapping. IMMUNITY. Ability of an animal or plant to resist infection by parasitic organisms. An essential requirement for survival, since most animals and plants are perpetually menaced by viruses, ...

Google previewEncyclopaedic Dictionary of Biology (2003)

by S. Choudhary

imaginal disc : One of series of discshaped structures in a fruit fly embryo which are located symmetrically along either side of the body. The imaginal discs are present within the larva and eventually develop into the body parts of the adult fruit fly during the pupal stage. imago : The sexually mature stage of an insect's life cycle. imbricate : Overlapping, describes something with many units in an overlapping arrangement, such as shingles on a roof ...

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Imaginal disc Meaning

Video shows what imaginal disc means. Any of several pairs of discs within the body of a larva that become part of the outside during pupal transformation.

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