semi-cylinder

A child stacks colorful wooden blocks, including a red semi-cylinder.

Definition

1. Noun:
   • A half-cylinder: "semi-cylinder" refers to an object or shape that is exactly half of a full cylinder, typically created by cutting a cylinder lengthwise through its central axis.

Usage Examples

• Noun:
  • The architectural design featured a semi-cylinder as a structural support. (A half-cylinder shape used in building.)
  • The glass was shaped like a semi-cylinder to hold the liquid. (A container with a half-cylinder form.)

Advanced Usage

• "semi-cylinder in geometry": a three-dimensional shape with a curved surface and two flat faces, one of which is a rectangle (the cut face) and the other a semicircle.

  • In the math class, the teacher explained how to calculate the volume of a semi-cylinder. (A half-cylinder used in geometric calculations.)

• "semi-cylinder as a functional object": used in engineering or design for tasks requiring a curved surface with a flat base.

  • The trough was a semi-cylinder made of metal for collecting rainwater. (A practical half-cylinder shape in everyday use.)

Variants and Related Words

• Semi-cylindrical (adj): having the shape of a semi-cylinder.

  • The roof had a semi-cylindrical profile. (The roof was shaped like a half-cylinder.)

• Cylinder (n): a solid geometric figure with straight parallel sides and a circular or oval cross-section.

  • A full cylinder is the base shape for a semi-cylinder. (The complete form from which a semi-cylinder is derived.)

Synonyms

• Half-cylinder: another term for semi-cylinder, often used interchangeably.
  • The container was a half-cylinder made of plastic. (A synonym for semi-cylinder.)

Related Idioms

• None: "semi-cylinder" is a specific geometric term and does not appear in common idiomatic expressions.