D defs.my
Entry 2 senses · 2 variants Webster, 1913

Eu

/ēy'-o͞oˌ/ approx. · IPA /ˌiː ˈjuː/
01 n. the chemical symbol for Europium, an element with atomic number 63 and atomic weight 151.96.
  1. 1.
    the chemical symbol for Europium, an element with atomic number 63 and atomic weight 151.96.(Chem.)
Syn. Europium.
02 A prefix used frequently in composition, signifying well, good, advantageous; -- the opposite of dys-.
  1. 1.
    A prefix used frequently in composition, signifying well, good, advantageous; -- the opposite of dys-.