This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Of, relating to, or concerned with a sacrifice: a sacrificial offering.

adj. Relating to sacrifice

adj. Used as a sacrifice.

adj. Of or pertaining to sacrifice or sacrifices; consisting in sacrifice; performing sacrifice.

Of, pertaining to, or used in sacrifice; concerned with sacrificing; consisting in or including sacrifice: as, sacrificial robes; a sacrificial meal.

adj. used in or connected with a sacrifice

"This is, of course, the provenance of the term sacrificial lamb."

sacrificially   

artificial    beneficial    initial    judicial    official    prejudicial    superficial    unofficial   

sacramental    sacred    ceremonial    baptismal    funerary    penitential    nuptial    mystical    pagan    propitiatory