(せいせん)

せいせん
noun, no-adjective
fresh (food)
1. fresh (food)
Used to describe fresh, perishable food products, particularly produce, meat, and seafood.
I shop in the fresh food section.
Fresh vegetables should be eaten quickly.
I bought fish at the fresh food market.

生鮮(せいせん) is a no-adjective meaning fresh, specifically for perishable food products.

WORD FORMATION:
(せい) (raw, fresh) + (せん) (fresh, vivid) = fresh (food)

GRAMMAR:
Used as no-adjective before nouns: 生鮮(せいせん)食品(しょくひん) (fresh food)

COMMON COLLOCATIONS:

SUPERMARKET SECTIONS:

NUANCE:
生鮮(せいせん) specifically refers to perishable freshness (needing refrigeration), while 新鮮(しんせん) is broader "freshness" including experiences and ideas.