Definify.com

Webster 1913 Edition

Spleenless

Spleen′less

,

Adj.

Having no spleen; hence, kind; gentle; mild.

[Obs.]

Chapman.

Webster 1828 Edition

Spleenless

SPLEENLESS

,

Adj.

Kind; gentle; mild.

Definition 2024

spleenless

spleenless

English

Adjective

spleenless ‎(not comparable)

Without a spleen.
- 2009 January 28, Harvey Araton, “A Fierce Tackler Has Taken His Share of Hits”, in New York Times:
  Surgery left him spleenless, not spineless.