Botany a gonidium formed within a receptacle. [ < scientific Latin endogonidium (1861 or earlier) < endo-endo-prefix and comb. form + gonidiumgonidiumn.]
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1881 W. B. CarpenterMicroscope (ed. 6) §311 These endogonidia..being set free by the dissolution of the wall of the parent-cell soon enlarge.