The spelling of the word "tunicary" can be a bit challenging to those new to the term. It is pronounced /ˈtjuːnɪkəri/ and is derived from the noun "tunic." The -ary ending is used to form adjectives that describe a particular activity, function or property. Thus, "tunicary" describes anything that resembles or relates to a tunic. It is a useful term particularly in the fields of zoology and botany, where it is used to describe anatomical features of certain organisms.