Standard Lemma guide

fiducial

adj · noun · 7 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

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • UK: /f(a)ɪˈdjuːʃ(ɪ)əl/
  • UK: /-ˈdʒuː-/
  • UK: /-uːs(ɪ)əl/
  • US: /fəˈd(j)uːʃəl/

1

adj

Meaning 1

Accepted as a fixed basis of reference.

Definition source: English Wiktionary via Wiktextract

Examples

  • Rulers and coins make good fiducial markers in photographs.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Based on having trust.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

In photography, a familiar reference object used to show size or scale, such as a ruler or a coin; a fiducial marker.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

In manufacturing, a small mark on a circuit board used to align components; a fiducial point.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

adjective

Meaning 5

used as a fixed standard of reference for comparison or measurement

Definition source: Princeton WordNet 3.0

Examples

  • a fiducial point

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

adjective

Meaning 6

relating to or of the nature of a legal trust (i.e. the holding of something in trust for another)

Definition source: Princeton WordNet 3.0

Examples

  • a fiduciary contract
  • in a fiduciary capacity
  • fiducial power

Meaning relationships

Synonyms: fiduciary

Antonyms: none provided

7

adjective satellite

Meaning 7

based on trust

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From Late Latin fīdūciālis, from fīdūcia (“trust, reliance”) + -ālis, from fīdō (“to trust”).

Across languages

Translations

11 source translations are retained for this English entry.

  • French: fiduciaire — accepted as a fixed basis of reference
  • German: fiduziell — accepted as a fixed basis of reference
  • Hebrew: מְהֵימָן — accepted as a fixed basis of reference
  • Russian: базовый (bazovyj) — accepted as a fixed basis of reference
  • Russian: реперный (repernyj) — accepted as a fixed basis of reference
  • Turkish: miyar birimi türünden — accepted as a fixed basis of reference
  • Turkish: ölçü birimi türünden — accepted as a fixed basis of reference
  • French: fiduciaire — based on having trust
  • Russian: доверительный (doveritelʹnyj) — based on having trust
  • Turkish: güvenen — based on having trust
  • Turkish: itimat eden — based on having trust