upcast

/' pk :st/

Thân thiện

The miners rely on the upcast to ventilate the deep tunnel.

Definition

1. Noun:

   • A ventilation shaft in a mine: An "upcast" is a vertical or inclined passage specifically designed to allow stale or used air to exit from an underground mine to the surface. It is the counterpart to the "downcast" shaft, which brings in fresh air.

2. Adjective:

   • Directed or thrown upward: Describes something that is cast, thrown, or projected in an upward direction.
   • Looking upward: Describes eyes or a gaze that is turned upward.

3. Verb (transitive):

   • To throw or cast upward: The action of projecting something upwards.
   • To direct the eyes upward: To look up.

Usage Examples

• Noun:

  • The miners ensured the upcast was clear to maintain proper airflow.
  • Polluted air from the lower levels rose through the upcast.

• Adjective:

  • He gave an upcast glance towards the sky.
  • The upcast trajectory of the stone was impressive.

• Verb:

  • She upcast a handful of seeds into the wind.
  • He upcast his eyes in a silent prayer.

Advanced Usage

• In geology: The term can refer to the side of a fault that has moved upward relative to the other side.
  • The geologist identified the upcast block of the fault line.

Variants and Related Words

• Upcasting (n/gerund): The act or process of casting upward.
• Upcasted (adj/verb past tense): Having been thrown or directed upward.

Synonyms

• Noun (shaft): Ventilation shaft, air shaft, exhaust shaft.
• Verb (throw): Toss up, hurl upward, project upward.
• Adjective (looking up): Upturned, raised.

Related Phrases

• Upcast shaft: The full term for the ventilation passage.
• Upcast eye: A literary way to describe looking upwards.

Học thuật

Noun

1. air passage consisting of a ventilation shaft through which air leaves a mine