Abstract
The knowledge for the specific object is expressed by a way of various explanations. In this study, we took out those explanations about terms from a Japanese-language dictionary and a biology textbook and categorize those explanations by the ways. As a result, the 20 types of the way of expression are extracted. Furthermore, we examined the appearance numbers those types in a Japanese-language dictionary and a biology textbook and clarified that there was deflection among the explanation type.