noun. The decrease in one's ability to ward off infections and disease. For instance, infections are more likely as human's age due to declining immune responsiveness.

ABIOTROPHY: "Abiotrophy was a likely culprit to why Albert finally succumbed to the cancer at age 73, after six years of fighting it."
Cite this page: N., Pam M.S., "ABIOTROPHY," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/abiotrophy/ (accessed October 26, 2020).