residual

Concise Oxford English Dictionary © 2008 Oxford University Press:
residual/rɪˈzɪdjuəl/

▶adjective

• 1 remaining after the greater part or quantity has gone or been subtracted.

  ■ (of a physical state or property) remaining after the removal of or present in the absence of a causative agent.

• 2 (of an experimental or arithmetical error) not accounted for or eliminated.

• 3 (of a soil or other deposit) formed in situ by weathering.

▶noun

• 1 a residual quantity.

• 2 a difference between a value measured in a scientific experiment and the theoretical or true value.

• 3 a royalty paid to a performer or writer for a repeat of a play, television show, or advertisement.

• 4 Geology a portion of rocky or high ground remaining after erosion.

• 5 the resale value of a new car or other item at a specified time after purchase.

– derivatives
residually adverb.