1. A rank, division, or level on the scale of a value system. 2. In cancer pathology, a classification of the degree of malignancy or differentiation of tumor tissue; e.g., well, moderately well, or poorly differentiated, and undifferentiated or anaplastic. 3. In exercise testing, the measurement of a vertical rise or fall as a percent of the horizontal distance traveled. [L. gradus, step]
- Gleason tumor g. a classification of adenocarcinoma of the prostate by evaluation of the pattern of glandular differentiation; the tumor g., known as Gleason score, is the sum of the dominant and secondary patterns, each numbered on a scale of 1 to 5.
- Heath-Edwards grades a system that describes the pathology of hypertensive pulmonary vascular disease.
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grade 'grād n a degree of severity of a disease or abnormal condition <a \grade III carcinoma>
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(grād) score.Medical dictionary. 2011.