Which word pertains to a base or basal part?

The term "basilar" specifically refers to something that is related to or situated at the base or bottom of a structure. In various fields, including anatomy and biology, "basilar" is commonly used to describe base structures in an organism or physical entity. For example, in anatomy, the term can refer to the basilar artery, which is located at the base of the brain. This highlights its relevance to the concept of a foundational or underlying part.

In contrast, the other terms focus on different meanings and contexts. "Benign" commonly describes a condition that is not harmful or serious, often used in medical contexts to refer to tumors or growths that are not cancerous. "Bicuspid" refers specifically to having two cusps or points, typically in relation to certain types of teeth or heart valves. "Brachial" relates to the arm, specifically the upper arm and adjoining structures. Each of these terms deals with distinct areas of study, making them unsuitable as answers to the query regarding a base or basal part.