Standard Lemma guide

octodecimo

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

A size of a sheet of paper resulting from folding and cutting a sheet of paper into eighteenths (3.5"–4.5" x 4.9"–5.9").

Definition source: English Wiktionary via Wiktextract

Qualifier: paper

Topics: media, printing, publishing

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A book consisting of pages of that size.

Definition source: English Wiktionary via Wiktextract

Topics: media, printing, publishing

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From Latin ablative of octusdecimus (“eighteenth”).