Is “Biorhythm” a Scrabble word?
Yes
BIORHYTHM
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Biorhythm
noun
1.Any cyclic biological or physiological pattern or activity
2.(pseudoscience) Any of three sinusoidal graphs, normally plotted by computer, having a person's birthdate as origin, that that are supposed to give meaningful information about emotional levels, physical energy levels, and mental/psychic sensitivity.