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Webster 1913 Edition

Adj.

Horselike.

[Obs.]

Chaucer.

horsly ‎(comparative horslier or more horsly, superlative horsliest or most horsly)

Pertaining to or relating to horses; horse-like; equine.
- 2011, K. M. Grant, Belle's Song:
  “The best I can say is that it was a very horsely horse. [...]"
(rare) Having the qualities most approved in a horse.

horsly ‎(comparative horslier or more horsly, superlative horsliest or most horsly)