| gastrula | (noun) double-walled stage of the embryo resulting from invagination of the blastula; the outer layer of cells is the ectoderm and the inner layer differentiates into the mesoderm and endoderm | - |
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| gastrulation | (noun) the process in which a gastrula develops from a blastula by the inward migration of cells | - |
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| glomerular | (adjective) of or relating to glomeruli | - |
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| morula | (noun) a solid mass of blastomeres that forms when the zygote splits; develops into the blastula | - |
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| serrulate | (adjective) minutely serrated | - |
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| spirula | (noun) a small tropical cephalopod of the genus Spirula having prominent eyes and short arms and a many-chambered shell coiled in a flat spiral | Synonyms: Spirula peronii |
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| sporulate | (verb) convert into spores | - |
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| (verb) produce spores | - |
| sporulation | (noun) asexual reproduction by the production and release of spores | Synonyms: monogenesis |
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