Definition

1. Noun:
   • One part in a hundred thousand equal parts: A unit of fractional measurement representing 1/100,000 of a whole.

Usage

• This word is used to express a very small fraction or proportion. It is typically used in contexts requiring precise measurement, such as in mathematics, science, engineering, or statistics.
• It functions as a singular countable noun. When used with a number, it often follows a cardinal number (e.g., ).

Examples

• Noun:
  • The margin of error was less than one one-hundred-thousandth of the total measurement.
  • This filter allows only a few one-hundred-thousandths of a gram of the substance to pass through.
  • The probability of that event is roughly five one-hundred-thousandths.

Advanced Usage

• As a fractional quantifier: Used to describe an extremely minute quantity or degree.
  • The new sensor can detect changes of one one-hundred-thousandth of a degree in temperature.

Variants and Related Words

• Hundred-thousandth (noun, often written without hyphens): An alternative spelling for the same fractional part.
  • The concentration was measured in hundred-thousandths.
• 100,000th (noun): A numerical representation of the same ordinal and fractional concept.

Synonyms

• 1/100,000: The numerical fraction equivalent.
• A hundred-thousandth part: A more descriptive phrase with the same meaning.

Notes on Meaning

• Ordinal Number Sense: While "one-hundred-thousandth" primarily denotes a fraction, the related ordinal number "hundred-thousandth" (e.g., ) refers to position in a sequence. These are distinct but related uses.
• Precision: This term emphasizes high precision and is not commonly used in everyday, informal conversation. It belongs to technical or formal registers.

Noun

1. one part in a hundred thousand equal parts