副食品 (fù shí pǐn) literally means 'secondary food item' — '副' implies something supplementary or auxiliary, '食' means 'food', and '品' means 'item' or 'product'. Unlike staple foods (主食品, zhǔ shí pǐn) such as rice, wheat, or corn that form the core of meals, 副食品 refers to non-staple grocery items: condiments, snacks, dairy, canned goods, beverages, frozen foods, and other processed or ready-to-eat products commonly sold in supermarkets and convenience stores.

This term is widely used in everyday shopping contexts, official statistics (e.g., price indices for 副食品), and government announcements about market supply. It carries a neutral, slightly formal register — common in news reports and retail signage, but less frequent in casual speech where people might simply say '零食' (snacks) or '调味品' (condiments) depending on the specific item. The word emphasizes function and category rather than origin or health value.