ridgeling

• ridgel, ridgil, ridgling, riggald, riglin, rigling

From ridge +‎ -ling, presumably from the supposition the remaining testicle(s) remain(s) near the back.

ridgeling (plural ridgelings)

1. A male animal with at least one testicle still in the inguinal canal.
2. An imperfectly castrated male.

• “ridgeling” in Webster’s Seventh New Collegiate Dictionary: Based on Webster’s Third New International Dictionary, 7th edition, Springfield, Mass.: G[eorge] & C[harles] Merriam, 1963 (1967 printing), →OCLC.

• regilding