exonuclease
- n a nuclease that releases one nucleotide at a time (serially) beginning at one of a nucleic acid
exophthalmic goiter
- n exophthalmos occurring in association with goiter; hyperthyroidism with protrusion of the eyeballs
exogen
- n flowering plant with two cotyledons; the stem grows by deposit on its outside
exogenous depression
- n an inappropriate state of depression that is precipitated by events in the person's life (to be distinguished from normal grief)
exomphalos
- n an umbilical hernia at birth in which some abdominal organs push into the umbilical cord
exon
- n sequence of a gene's DNA that transcribes into protein structures
exons are interspersed with introns
exoneration
- n the condition of being relieved from blame or obligation
- n the act of vindicating or defending against criticism or censure etc.