A prefix meaning under, below, or deficient.

Having fewer cells than normal in a tissue, often used in reference to bone marrow.

A person excessively worried about having a serious illness; also refers to the region of the abdomen beneath the ribs.

A condition in which red blood cells have less color than normal, typically due to low hemoglobin levels.

The part of a seedling stem below the cotyledons and above the root.

The layer of tissue beneath the dermis of the skin, containing fat and connective tissue.

Referring to seed germination where the cotyledons remain below the ground.

Underdevelopment or incomplete development of a tissue or organ.

A region of the brain that controls vital functions such as temperature regulation, hunger, and hormone release.

A dangerous drop in body temperature below the normal range, usually due to prolonged exposure to cold.