Biology - The Study of Life

Biological Vocabulary of Kingdom Animalia - Taxonomy

The English word Biology  is made up of two Greek words:

from the Greek word (life)

from the Greek word (mind or intellect)

All scientific words ending in -logy represent the concept 

of using the mind or intellect to study a particular subject, 

in this case ("bio" or life). Thus, Biology is the "study of life."