Definition

Noun: * A medical condition of the foot characterized by the flattening or lowering of the medial longitudinal arch, often resulting in the entire sole of the foot coming into complete or near-complete contact with the ground.

Usage

• The term is used in formal, medical, and anatomical contexts to describe a specific structural condition of the foot.
• It is often contrasted with a normal, arched foot ().

Examples

• The patient was diagnosed with pes planus, which explained his chronic foot pain.
• Pes planus can sometimes be asymptomatic, but it may contribute to problems in the knees and lower back.
• Special orthotic inserts are commonly prescribed to support the arch in cases of pes planus.

Advanced Usage

• Flexible vs. Rigid Pes Planus: In medical diagnosis, a distinction is made between flexible pes planus (where the arch appears when non-weight-bearing but flattens upon standing) and rigid pes planus (where the arch is absent in all positions).

Variants and Related Words

• Flatfoot (noun): The common, non-technical synonym for pes planus.
• Fallen Arches (noun phrase): A descriptive term for the condition.

Synonyms

• Flatfoot
• Fallen arches

Antonyms

• Pes cavus (a condition of an abnormally high arch)

Noun

1. a foot afflicted with a fallen arch; abnormally flattened and spread out