abwatt: a power unit equal to the power dissipated when 1 abampere flows across a potential difference of 1 abvolt (one ten-thousandth of a milliwatt)
entity: that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
echidna: a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to Australia