large primitive fishes valued for their flesh and roe; widely distributed in the North Temperate Zone
"The fisherman proudly displayed his catch of sturgeon, a prized species known for its rich meat and valuable caviar."
Any marine or freshwater fish of the family Acipenseridae that are prized for their roe and are endemic to temperate seas and rivers of the northern hemisphere, especially central Eurasia.
"The chef carefully harvested the sturgeon from the river so we could prepare a delicate batch of caviar for dinner."
A surname.
"The Sturgeon family has lived on that farm for three generations."