·adj Concordant; musical; consonant; as, harmonic sounds.
II. Harmonical ·adj Having relations or properties bearing some resemblance to those of musical consonances;
— said of certain numbers, ratios, proportions, points, lines. motions, and the like.
III. Harmonical ·adj Relating to harmony, — as melodic relates to melody; harmonious; ·esp., relating to the accessory sounds or overtones which accompany the predominant and apparent single tone of any string or sonorous body.