Is “Megastructure” a Scrabble word?
Yes
MEGASTRUCTURE
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 Megastructure
noun
1.A very large structure.
2.The large-scale structure of a material, as contrasted to the fine-scale structure.
Synonyms: macrostructure