The concept of vegetarianism is becoming more complicated and ambiguous. The
word "pesco" is Latin for fish and pesco vegetarianism refers to a
diet that includes fish in addition to plant based foods. All other types of
meats and their products are excluded. The word "pollo" is derived
from Latin as well and means chicken. Pollo vegetarianism refers to a vegetarian
diet that includes chicken while avoiding red meat and fish. Pesco-pollo vegetarianism
is a combination of the above two types and involves a diet that allows chicken
and fish while avoiding red meat. All these types of diets are sometimes referred
to as being semi-vegetarian.