arthroncus

From arthr- (“joint”) +‎ -oncus (“tumor”), from Ancient Greek ἄρθρον (árthron, “a joint”) and Ancient Greek ὄγκος (ónkos, “tumor”).

arthroncus (uncountable)

1. (pathology) A tumor or swelling of a joint.
   • 2018, Zhang Tian Zhang Tian, Chen ShiJie Chen ShiJie, Chai Zhi Chai Zhi, Wang YiRu Wang YiRu, Zhao XiaoHong Zhao XiaoHong, Lao WenYan Lao WenYan, “The preventive effects of astaxanthin and glucosamine on chronic osteoarthritis in rats”, in Acta Nutrimenta Sinica‎^[1], volume 40, number 9:

     Compared with the control group, the arthroncus was increased.

• William Dwight Whitney and Benjamin E[li] Smith, editors (1914), “arthroncus”, in The Century Dictionary: An Encyclopedic Lexicon of the English Language, revised edition, volumes I (A–C), New York, N.Y.: The Century Co., →OCLC.
• “arthroncus” in Farlex Partner Medical Dictionary. (2012).