talus

/'teiləs/
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talus

A hiker carefully descends a steep talus slope.

Definition
  1. Noun:
    • Anatomy: The talus is a bone in the foot that sits between the leg bones (tibia and fibula) and the heel bone (calcaneus), forming the main part of the ankle joint. It is also known as the anklebone.
    • Geology/Geomorphology: A talus is a sloping accumulation of broken rock fragments at the base of a cliff or steep slope, formed by the process of rockfall or weathering.
Usage Examples
  • Anatomy:
    • A fracture of the talus can severely impact a person's ability to walk.
    • The talus articulates with the tibia to allow the up-and-down motion of the foot.
  • Geology:
    • Hikers must be careful when crossing the unstable talus at the mountain's base.
    • The steep cliff was bordered by a large talus of scree and boulders.
Advanced Usage
  • Anatomical Context: In medical terminology, the talus is a key component in describing ankle injuries or conditions like "talus fracture" or "osteochondral lesion of the talus."
  • Geological Context: The term is used to describe specific landforms. A "talus slope" or "talus cone" refers to the distinct shape of the accumulated debris.
Variants and Related Words
  • Anatomy:
    • Astragalus: An older, synonymous term for the talus bone.
  • Geology:
    • Scree: A close synonym, often used interchangeably with "talus" to describe a collection of loose stones on a slope. Some distinctions exist, with "scree" sometimes referring to the smaller fragments and "talus" to the entire slope or larger debris.
    • Colluvium: A broader geological term for loose, unconsolidated sediments deposited at the base of slopes.
Synonyms
  • Anatomy: Anklebone, astragalus.
  • Geology: Scree, debris slope, rockfall.
Related Phrases
  • Talus slope: The inclined surface formed by the accumulation of talus.
    • The trail wound its way up the steep talus slope.
  • Talus cone: A cone-shaped deposit of talus, typically found below a gully or chute.
    • A prominent talus cone marked the outlet of the couloir.
talus

A hiker carefully descends a steep talus slope.

Noun
  1. the bone in the ankle that articulates with the leg bones to form the ankle joint
  2. a sloping mass of loose rocks at the base of a cliff

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