紫外
ultraviolet (ray)
✍️ Practice Writing the Full Phrase
📖 Additional Information
English Phonetic:
rei
Detailed Definition:
n. a branch of an umbel or an umbelliform inflorescence\nn. (mathematics) a straight line extending from a point\nn. any of the stiff bony spines in the fin of a fish\nn. cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins