What does vitellus mean?

Definitions for vitellus
vɪˈtɛl əs, vaɪ-vitel·lus

This dictionary definitions page includes all the possible meanings, example usage and translations of the word vitellus.

Princeton's WordNet

  1. yolk, vitellusnoun

    nutritive material of an ovum stored for the nutrition of an embryo (especially the yellow mass of a bird or reptile egg)


  1. vitellus

    Among animals which produce eggs, the yolk (; also known as the vitellus) is the nutrient-bearing portion of the egg whose primary function is to supply food for the development of the embryo. Some types of egg contain no yolk, for example because they are laid in situations where the food supply is sufficient (such as in the body of the host of a parasitoid) or because the embryo develops in the parent's body, which supplies the food, usually through a placenta. Reproductive systems in which the mother's body supplies the embryo directly are said to be matrotrophic; those in which the embryo is supplied by yolk are said to be lecithotrophic. In many species, such as all birds, and most reptiles and insects, the yolk takes the form of a special storage organ constructed in the reproductive tract of the mother. In many other animals, especially very small species such as some fish and invertebrates, the yolk material is not in a special organ, but inside the egg cell. As stored food, yolks are often rich in vitamins, minerals, lipids and proteins. The proteins function partly as food in their own right, and partly in regulating the storage and supply of the other nutrients. For example, in some species the amount of yolk in an egg cell affects the developmental processes that follow fertilization. The yolk is not living cell material like protoplasm, but largely passive material, that is to say deutoplasm. The food material and associated control structures are supplied during oogenesis. Some of the material is stored more or less in the form in which the maternal body supplied it, partly as processed by dedicated non-germ tissues in the egg, while part of the biosynthetic processing into its final form happens in the oocyte itself.Apart from animals, other organisms, like algae, especially in the oogamous, can also accumulate resources in their female gametes. In gymnosperms, the remains of the female gametophyte serve also as food supply, and in flowering plants, the endosperm.


  1. vitellus

    Vitellus, also known as the yolk, is the nutrient-bearing portion of an egg which serves as the primary food source for the developing embryo. In botany, it refers to the nutritive tissue within seeds of flowering plants.

Webster Dictionary

  1. Vitellusnoun

    the contents or substance of the ovum; egg yolk. See Illust. of Ovum

  2. Vitellusnoun

    perisperm in an early condition

  3. Etymology: [L., the yolk of an egg.]

Chambers 20th Century Dictionary

  1. Vitellus

    vī-tel′us, n. the yolk of an egg.—adjs. Vit′ellary, Vitell′ine, pertaining to the vitellus, or forming such.—n. Vitell′icle, a yolk-sac.—adj. Vitelligenous (-ij′-), producing yolk. [L., 'a yolk,' a transferred use of vitellusvitulus, a calf.]

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  1. Chaldean Numerology

    The numerical value of vitellus in Chaldean Numerology is: 4

  2. Pythagorean Numerology

    The numerical value of vitellus in Pythagorean Numerology is: 3

Translations for vitellus

From our Multilingual Translation Dictionary

  • விட்டெல்லஸ்Tamil

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"vitellus." Definitions.net. STANDS4 LLC, 2024. Web. 27 May 2024. <https://www.definitions.net/definition/vitellus>.

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