Physics, Chemistry. 1  a wave function describing the state of a single electron in an atom (atomic orbital) or in a molecule (molecular orbital) 2  the electron in that state.
DEFINITION of 'Yo-Yo'. Slang for a very volatile market. A yo-yo market will have no distinguishing features of either an up or down market, taking on characterstics of both. Security prices in a yo-yo market will swing very high to low over a given period of time, making it difficult for buy and hold investors to profit. Next Up.
But beware: When a Yo-kai enters your life, things will never be quite the same.. 1  The Animated Adaptation of the popular Yo-kai Watch video game series.The series is about an eleven year old boy named Nate who finds a capsule machine while looking for bugs in the woods. When he opens a capsule from the machine he releases a Yo-kai named Whisper, who decides to become his butler out of gratitude. He later gives Nate the titular Yo-Kai Watch. The Yo-kai Watch enables Nate to see other Yo-kai by shining a light on them.