cast
Definition
The cast is a mould of something that has been made by pouring liquid into a mould and then letting it harden. The liquid used to make a cast is often plaster of Paris, but it can also be other materials, such as silicone or epoxy.
Casts are often used to make copies of things, but they can also be used to repair broken objects or to create moulds for making new objects.
Casts are made by pouring the liquid into a mould that has been made of a material that will not react with the liquid. Once the liquid has hardened, the cast can be removed from the mould.
Casts can be used to make copies of objects that are too large or too fragile to be moved.
They can also be used to repair broken objects by filling in the cracks with liquid.
Casts can also be used to create moulds for making new objects. For example, a cast of a person's foot can be used to make a mould for a custom-made shoe.
How can the word be used?
The sculptor cast the statue in bronze.
Different forms of the word
Noun.
Singular: cast.
Plural: casts.
Verb.
Present tense: cast.
Past tense: cast.
Past participle: cast.
Present participle: casting.
Adjective.
Cast: made of a particular material.
Etymology
The word "cast" comes from the Old English word "ceastan", which means "to throw". The word "ceastan" is derived from the Proto-Germanic root *kastjaną, which also means "to throw".
Question
What objects around you have been cast?
AQA Science Exam Question and Answer
Question:
Define a "cast" in the context of human anatomy, and describe a situation where a cast might be used as a medical intervention.
Answer:
In human anatomy, a "cast" refers to a rigid, protective device applied to a fractured or injured body part, usually made of plaster or fibreglass, to immobilise and support the affected area during the healing process.
Example of a Situation for Using a Cast:
A common situation where a cast might be used as a medical intervention is for treating a broken bone, such as a fractured arm or leg. When a bone is fractured, the cast is applied around the affected limb, keeping the broken bone in proper alignment and preventing movement. By immobilising the injured area, the cast allows the bone to heal properly over time. Casts are essential in promoting bone healing, reducing pain, and preventing further injury to the affected body part during the recovery period.