decillion
C2Formal, Technical, Hyperbolic
Definition
Meaning
The cardinal number equivalent to 1 followed by 60 zeros in the long scale (UK, traditional Europe) or 1 followed by 33 zeros in the short scale (US, modern UK).
In informal or hyperbolic contexts, it can be used to refer to an unfathomably large quantity, often to emphasize excess.
Linguistics
Semantic Notes
A cardinal number used in specific fields like cosmology, cryptography, or pure mathematics. Its exact value is scale-dependent, which is its primary semantic complexity. In casual use, it's a non-specific hyperbole for a vast number.
Dialectal Variation
British vs American Usage
Differences
The primary difference is the scale system. Traditionally, British English used the 'long scale' (10^60). However, since 1974, UK official usage has aligned with the US 'short scale' (10^33) for government and financial statistics, though the long scale persists in some older or traditional contexts. Modern dictionaries often list the short scale definition first.
Connotations
In the UK, traditional use carries a connotation of an older, more classical mathematical tradition. In the US, the term is more firmly associated with the modern short scale. In hyperbolic use, connotations are identical: extreme magnitude.
Frequency
Extremely low frequency in both varieties. Almost exclusively found in specialized mathematical/computational texts or as deliberate hyperbole. The short-scale usage is now more globally common in international scientific discourse.
Vocabulary
Collocations
Grammar
Valency Patterns
[number] decillion [of something]a decillion [plural noun]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “Not so much an idiom, but used in hyperbolic phrases like 'a decillion things to do'.”
Usage
Context Usage
Business
Virtually never used, except perhaps in hyperbolic venture capital pitches ('a decillion-dollar market').
Academic
Used in pure mathematics, theoretical physics (cosmology), and cryptography when discussing combinatorial or probabilistic spaces.
Everyday
Only used for deliberate, humorous exaggeration ('I've told you a decillion times').
Technical
Precise use in fields requiring naming of large numbers. Essential to specify short or long scale.
Examples
By Part of Speech
verb
British English
- It is impossible to 'decillion' as a verb.
American English
- It is impossible to 'decillion' as a verb.
adverb
British English
- It is not used as an adverb.
American English
- It is not used as an adverb.
adjective
British English
- The decillion figure was cited in the 19th-century treatise.
- He estimated a decillion-particle system.
American English
- The decillion calculation required a supercomputer.
- A decillion-dollar deficit is a theoretical hyperbole.
Examples
By CEFR Level
- The chances of that happening are about one in a decillion! (hyperbolic)
- In some number systems, a decillion is written as 1 followed by 60 zeros.
- The cryptography problem had over a decillion possible solutions.
- The physicist clarified that the estimated number of quantum states was 10^33, or one decillion in the short scale, not the long scale.
- When discussing combinatorics, the professor nonchalantly referred to values on the order of a decillion.
Learning
Memory Aids
Mnemonic
Think 'DECade' + 'million' but with a twist: A 'decillion' in the common short scale has 33 zeros, which is 3 groups of 10^9 plus 3 more zeros. Or remember it as the '10th -illion' in the series (million, billion, trillion... decillion).
Conceptual Metaphor
NUMBER IS SIZE. The word is used metaphorically to conceptualize an abstract, unimaginably large quantity as a concrete, named entity, thereby making the vastness somewhat graspable.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- The Russian система наименования чисел uses the long scale. Therefore, a direct translation 'дециллион' refers to 10^60, NOT the American/UK modern 10^33. This is a critical false friend in technical contexts.
- In hyperbolic casual speech, the trap is over-literal translation, which would sound bizarre. Use 'бесконечное количество' or 'миллион' hyperbolically instead.
Common Mistakes
- Using it without clarifying the scale (short vs. long).
- Misspelling as 'decilion' or 'decillian'.
- Using it in formal writing where scientific notation (e.g., 10^33) would be clearer.
- Assuming its hyperbolic use is understood in non-native contexts.
Practice
Quiz
What is the most critical factor to clarify when using 'decillion' in a technical paper?
FAQ
Frequently Asked Questions
It depends. In the short scale (used in the US and modern UK), it's 10^33 (1 with 33 zeros). In the long scale (traditional UK and Europe), it's 10^60 (1 with 60 zeros). You must specify the scale.
Yes, but rarely. It's a standard term in the nomenclature of large numbers, used in very specific technical fields like mathematics and cosmology. Its everyday use is almost always humorous exaggeration.
In the short scale, it's undecillion (10^36), then duodecillion (10^39), and so on. In the long scale, after a decillion (10^60) comes an undecillion (10^66).
Because 10^33 and 10^60 are astronomically different numbers. Misunderstanding the scale in a scientific, financial, or cryptographic context could lead to an error of 27 orders of magnitude—a mistake of unimaginable proportion.