food-grade
UK[ˈfuːd ɡreɪd]US[ˈfuːd ɡreɪd]
adj
Of a quality suitable for use with or consumption as food.
Morpheme Breakdown
food
grade
food
nourishment
grade
quality level
Etymology
The compound adjective 'food-grade' is a modern industrial term formed by combining two English words of distinct origins. 'Food' is a foundational Germanic word, traceable to Proto-Germanic fōdô, which relates to the act of feeding and consumption. 'Grade' entered English from Latin 'gradus', meaning a step or degree, through French influence, and came to signify a level of quality or classification. The term's logic is transparently literal: it designates a material or product that meets the specific quality level or standard required for safe contact with or inclusion in food, evolving from these concrete roots to a precise technical and regulatory descriptor.
Analysis
Structure: food (nourishment) + grade (quality level)
food: From Old English 'fōda', of Germanic origin, meaning nourishment or what is eaten.
grade: From Latin 'gradus' (step, degree), via French 'grade', meaning a level or rank in a scale.
Examples
The factory uses only food-grade stainless steel in its production lines.
This lubricant is certified food-grade and safe for use in kitchen machinery.
Always store chemicals separately from food-grade containers to avoid contamination.