| ray | (noun) cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins | - |
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| (noun) any of the stiff bony spines in the fin of a fish | - |
| (noun) the syllable naming the second (supertonic) note of any major scale in solmization | Synonyms: re |
| (noun) a column of light (as from a beacon) | Synonyms: beam, beam of light, irradiation, light beam, ray of light, shaft, shaft of light |
| (noun) a group of nearly parallel lines of electromagnetic radiation | Synonyms: beam, electron beam |
| (noun) a branch of an umbel or an umbelliform inflorescence | - |
| (noun) (mathematics) a straight line extending from a point | - |
| (verb) expose to radiation | Synonyms: irradiate |
| (verb) extend or spread outward from a center or focus or inward towards a center | Synonyms: radiate |
| (verb) emit as rays | - |
| rayless | (adjective) having no parts resembling rays; not having ray flowers | - |
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| rayon | (noun) a synthetic silklike fabric | - |
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| rayons | (noun) women's stockings made from a sheer material (nylon or rayon or silk) | Synonyms: nylon stocking, nylons, rayon stocking, silk stocking |
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