der·e·lic·tion 
(dĕr′ə-lĭkshən)
(dĕr′ə-lĭkshən)n.
1. Willful neglect, as of duty or principle.
2.
a. The act of abandoning; abandonment.
b. A state of abandonment or neglect.
3. Law
a. A gaining of land by the permanent recession of the water line.
b. The land so gained.