triskelion (n.)youdaoicibaDictYouDict[triskelion 词源字典]
"figure consisting of three branches radiating from a center," 1880, earlier triskelos (1857), from Greek triskeles "three-legged," from tri- "three" (see tri-) + skelos "leg" (see scoliosis).[triskelion etymology, triskelion origin, 英语词源]