secondary
adjective
uk/ˈsekəndəri/ usless important than related things:
a secondary consideration/factor/objective
Annual reported earnings are often seen as being of only secondary importance.
PRODUCTION
developed from something similar that existed earlier:
They are the single largest provider of aluminium and its secondary products.
FINANCE, STOCK MARKET
used to describe the trading of existing bonds, shares, etc. rather than new ones:
Mortgage securities were mixed in secondary trading.
Compare
primary