D

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DAYDREAM

a waking fallacy wherein aware or unaware desires, and at times, fears or worries, are played out in the mind.

DEATH GENE

a gene which is manifested only whenever a cell comes to be devoted to the programmed death of a cell.

DECALAGE

Jean Piaget's theory of cognitive development about the invariant order that cognitive developments occur in. See horizontal or vertical decalage.