| a fool or simpleton; ninny. |
| the offspring of a zebra and a donkey. |
blastocoel blas·to·coel or blas·to·cele or blas·to·coele (blās'tə-sēl')
n.
The fluid-filled cavity in the blastula of a developing embryo. Also called cleavage cavity, segmentation cavity.
| blastocoel or blastocoele (blās'tə-sēl') Pronunciation Key
The fluid-filled, central cavity of a blastula. |