define pescetarianism
Wiktionary(0.00 / 0 votes)Rate this definition: pescetarianism(Noun) Pescetarianism is a dietary choice in which a person, known as a pescetarian, eats any combination of vegetables, fruit, nuts, beans and fish or seafood, but will not eat mammals or birds. Some animal products like eggs and dairy may or may not be part of a pescetarian diet plan.