Is “Zeitgeber” a Scrabble word?
Yes
ZEITGEBER
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 Zeitgeber
/ˈtsʌɪtɡeɪbə/
noun
1.A rhythmically occurring cue given by the environment, such as a change in light or temperature, to reset the internal body clock.