Low means you can eat several servings per day of this food and not go over the suggested daily value for that nutrient. 1  The word low is used to describe fat, calorie, and sodium contents of foods. 2  Low fat means less than or equal to 3g total fat per serving. 3  A low calorie food has 40 calories or less per serving.
Webster Dictionary(0.00 / 0 votes)Rate this definition: 1  Hypo-. a prefix signifying a less quantity, or a low state or degree, of that denoted by the word with which it is joined, or position under or beneath. 2  Hypo-.
home / medterms medical dictionary a-z list / ortho- (prefix) definition Medical Definition of Ortho- (prefix) Ortho- (prefix): Prefix meaning straight or erect. From the Greek orthos that means just that: straight or erect. Examples of terms involving ortho- include orthodontics (straightening the teeth), orthopaedics (straightening the child), orthopnea (breathing easily only in an upright position), orthostatic (an upright posture), etc.