Which term describes the condition of abnormal curvature?

The term that describes the condition of abnormal curvature is "gryposis." This condition typically refers to an abnormal curvature of the bones or the spine. It is a medical term derived from Greek that denotes a bending or twisting that affects structural alignment. Gryposis can be indicative of various underlying conditions or diseases and is often observed in clinical settings when diagnosing musculoskeletal issues.

The other options do not relate to curvature. "Gratification" pertains more to feelings of pleasure or satisfaction rather than a physical condition. "Grizzle" generally refers to a color that is grayish or mixed with gray, often used in describing animals. "Gleeking" is a term related to the expulsion of saliva, particularly when the submandibular glands contract and squirt saliva into the mouth, which has no association with curvature. Therefore, the correct term for abnormal curvature is indeed gryposis.