Definify.com
Webster 1913 Edition
White-livered
White′-livˊered
,Adj.
 Having a pale look; feeble; hence, cowardly; pusillanimous; dastardly.
Syn. – lily-livered. 
They must not be milksops, nor 
white-livered 
knights. Latimer.
Webster 1828 Edition
White-livered
WHITE-LIVERED
,Adj.
 1.
 Having a pale look; feeble; cowardly.2.
 Envious; malicious.