Food that was raw had not been cooked.
In 2269, Spock advised Nyota Uhura and Hikaru Sulu to think about eating raw vegetables to block Kzinti telepathy. (TAS: "The Slaver Weapon")
In 2373, Quark lauded the delights of eating breakfast in a bar to Morn, asking, "Where else can you get raw slug liver first thing in the morning?" (DS9: "The Assignment")
Also that year, Chakotay guessed that an embarrassed B'Elanna Torres was about to threaten to "rip my heart out and eat it raw" if he spoke to anyone about her dreams. (VOY: "Remember")