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A solid mass of blastomeres formed by cleavage of the eggs of many animals; precedes the blastula or gastrula, depending on the type of egg.
(invertebrate zoology)
A cluster of immature male gametes in which differentiation occurs outside the gonad; common in certain annelids.



a stage in the development of the embryo in multicellular animals, preceding the completion of the period of cleavage. In the morula stage, the embryo is a mass of cells (blastomeres) that resembles the aggregate fruit (“berry”) of the raspberry, blackberry, or mulberry. The morula stage is followed by the blastula stage.

References in periodicals archive ?
Ehrlichial meningitis with cerebrospinal fluid morulae.
But these findings also suggest that clinicians shouldn't cancel the transfer if only morulae are available, a practice that is common in some in vitro fertilization clinics, Dr.
Fine structure of spermiogenesis with special reference to the spermatid morulae of the freshwater mussel Prisodon alatus (Bivalvia, Unionoidea).
Because the blood samples were transported frozen, detection of morulae was not possible.
Successful production of piglets derived from vitrified morulae and early blastocysts using a microdroplet method.
phagocytophilum morulae in neutrophils, and she was PCR positive on day 13 ([C.
The buffy-coat smear performed 4 days after illness onset showed basophilic intracytoplasmic inclusions inside vacuoles of lymphocytes and monocytes, with typical features of morulae reported for human monocytic ehrlichiosis (Figure).
Synergistic effect of alanin and glycine on bovine embryos cultured in a chemically defined medium and animo acid uptake by in vitro-produced bovine morulae and blastocyst.