from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The spherical embryonic mass of blastomeres formed before the blastula and resulting from cleavage of the fertilized ovum.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A spherical mass of blastomeres that forms following the splitting of a zygote; it becomes the blastula.

from the GNU version of the Collaborative International Dictionary of English

  • n. The sphere or globular mass of cells (blastomeres), formed by the clevage of the ovum or egg in the first stages of its development; -- called also mulberry mass, segmentation sphere, and blastosphere. See segmentation.

from The Century Dictionary and Cyclopedia

  • n. In embryology, the condition (resembling a mulberry) of an ovum after complete segmentation of the vitellus or yolk and before the formation of a blastula, when the contents are a mass of cells derived by cleavage of the original and successively formed nuclei; a mulberry-mass of blastomeres or cleavage-cells. See monerula, blastula, gastrula, and cut under gastrulation.
  • n. In pathology, same as button-scurvy (which see, under scurvy).

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a solid mass of blastomeres that forms when the zygote splits; develops into the blastula


from The American Heritage® Dictionary of the English Language, 4th Edition

New Latin mōrula, feminine diminutive of Latin mōrum, mulberry.

from Wiktionary, Creative Commons Attribution/Share-Alike License

From diminutive of Latin morum ("mulberry").


  • 5 The process is repeated again and again, so that the two cells are succeeded by four, eight, sixteen, thirty-two, and so on, with the result that a mass of cells is found within the zona striata, and to this mass the term morula is applied (Fig. 9).

    I. Embryology. 5. Segmentation of the Fertilized Ovum

  • A solid mass of cells is formed at the beginning, called a morula, Figure 1.

    Text Book of Biology, Part 1: Vertebrata

  • This is called the morula (= mulberry-embryo) on account of its resemblance to a mulberry or blackberry.

    The Evolution of Man — Volume 2

  • From early afternoon yesterday, I lay on my bed reading and just out the glass doors in the male morula tree was a big spotted eagle owl attempting to get some shelter from the relentless rain.

    ....and it's back to work-sort of!

  • A fertilized egg morula, blastulocyst, very early embryo has no brain.

    Even For Pro-Lifers, Banning Abortion Makes No Sense

  • We lost two on Friday, one other was at the morula stage.

    brile Diary Entry

  • Internal timing now somehow tells the morula to change shape from a compact ball of sixty or so cells to a fluid-filled sphere, the “blastocyst,” housing those previously starved cells destined to become the embryo.


  • The morula, as the cluster of cells is called at this stage, floats freely in the uterus until seven or eight days after ovulation, absorbing its needed nutrients from uterine secretions.


  • Fruits such as baobab (Adansonia digitata) and morula (Sclerocarya birrea) are exceptionally rich in the vitamin.

    Chapter 4

  • The morula, a compact mulberry-like congeries of segmentation-cells, corresponded to the synamoeba, or earliest association of undifferentiated amoeboid cells to form the first multicellular organism.

    Form and Function A Contribution to the History of Animal Morphology


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  • Literally, a blackberrylet.

    December 24, 2008

  • I've always liked this word, once for being etymologically a blackberry (in fact, I have a Latin-lover friend who calls her email/phone thingie a Morula, just to be different), and once for being more embryonic than an embryo.

    December 24, 2008