Definition

1. Adjective:
   • Having a rounded bottom: Describes an object whose base or lower part is curved or spherical rather than flat or pointed.

Usage

• The adjective "round-bottomed" is used attributively, typically placed before a noun to describe its shape.
• It is a compound adjective formed by combining "round" and "bottomed." The "-ed" suffix indicates that the noun (bottom) possesses the quality described by the first word (round).

Examples

• Attributive use:
  • The chemist used a round-bottomed flask for the distillation.
  • The round-bottomed boat was very stable in the water.

Advanced Usage

• Technical/Scientific Context: The term is common in laboratory terminology to describe specific glassware designed for even heating.
  • The reaction requires a round-bottomed flask to prevent cracking under heat.

Variants and Related Words

• Round-bottom: Often used as a noun modifier in compound nouns (e.g., "round-bottom flask"). This form is common in technical catalogs and names for specific objects.
• Flat-bottomed: (Adjective) Having a flat base. This is a common antonym.
• Spherical: (Adjective) Shaped like a sphere. While similar, "spherical" describes a full 3D shape, whereas "round-bottomed" specifically describes the characteristic of the bottom.

Synonyms

• Curved-bottom: Having a bottom that is curved.
• Bulbous-bottomed: Having a bottom that is swollen and rounded (more specific).

Antonyms

• Flat-bottomed: Having a flat base.
• Pointed-bottom: Having a bottom that comes to a point.

Notes

• "Round-bottomed" is a descriptive term primarily used for man-made objects like cookware, laboratory equipment, and boats. It is less commonly used for natural objects.
• The hyphen is standard in this compound adjective when it precedes a noun.

Adjective

1. having a rounded bottom
   • round-bottom flasks