Is a heliogram still used today?

No, it is an obsolete technology largely replaced by radio and electronic communication, though it may be used in historical reenactments or extreme survival situations.

What's the difference between a heliograph and a heliogram?

A heliograph is the mirror device used to send the signal. A heliogram is the message or signal itself that is sent.

Could a heliogram be sent at night?

No, by definition it requires sunlight to create the flashing signal. Moonlight is too weak for practical use.

What is the origin of the word 'heliogram'?

It comes from Greek 'helios' (sun) + 'gramma' (something written, a message).

Is “heliogram” formal?

Heliogram is usually technical / historical in register.

How do you pronounce “heliogram”?

Heliogram: in British English it is pronounced /ˈhiːlɪə(ʊ)ɡram/, and in American English it is pronounced /ˈhiːlioʊˌɡræm/. Tap the audio buttons above to hear it.

heliogram: meaning, definition, pronunciation and examples

Rare / Obsolete

UK/ˈhiːlɪə(ʊ)ɡram/US/ˈhiːlioʊˌɡræm/

Technical / Historical

My Flashcards

Quick answer

What does “heliogram” mean?

A message sent by reflecting sunlight with a heliograph (a mirror device).

Audio

Pronunciation

Definition

Meaning and Definition

A message sent by reflecting sunlight with a heliograph (a mirror device).

Any signal or communication transmitted using flashes of sunlight; historically, a form of military or long-distance signaling before the advent of radio.

Dialectal Variation

British vs American Usage

Differences

No significant differences in meaning or usage. The term is equally archaic in both varieties.

Connotations

Historical, military, pioneering communication, often associated with 19th-century exploration or warfare.

Frequency

Extremely rare in both dialects, found almost exclusively in historical texts or discussions of obsolete technology.

Grammar

How to Use “heliogram” in a Sentence

[Subject] sent/received/flashed a heliogram [to/from Recipient] [using Instrument].

Vocabulary

Collocations

strong

send a heliogramreceive a heliogrammilitary heliogram

medium

flash a heliogramheliogram messageencoded heliogram

weak

distant heliogramurgent heliogramsunlight heliogram

Examples

Examples of “heliogram” in a Sentence

verb

British English

The signaller heliogrammed the coordinates to the forward outpost.

American English

They heliogrammed a distress signal to the rescue party.

adjective

British English

The heliogram communication was slow but reliable in the clear desert air.

American English

They deciphered the heliogram code within minutes.

Usage

Meaning in Context

Business

Not used.

Academic

Used in historical or military history papers discussing 19th-century communication.

Everyday

Not used.

Technical

Used precisely to denote a message sent via heliograph in historical reenactments, niche technical histories, or survivalist contexts.

Vocabulary

Synonyms of “heliogram”

Strong

heliograph message

Neutral

heliograph signalsun signallight signal

Weak

optical telegraphmirror messageflash message

Vocabulary

Antonyms of “heliogram”

radio messageelectronic communicationwire signal

Watch out

Common Mistakes When Using “heliogram”

Confusing 'heliogram' with 'heliograph' (the device vs. the message).
Using it to refer to modern solar-powered communications.
Misspelling as 'heliogramme' (archaic British spelling is rare).

FAQ

Frequently Asked Questions

: No, it is an obsolete technology largely replaced by radio and electronic communication, though it may be used in historical reenactments or extreme survival situations.
: A heliograph is the mirror device used to send the signal. A heliogram is the message or signal itself that is sent.
: No, by definition it requires sunlight to create the flashing signal. Moonlight is too weak for practical use.
: It comes from Greek 'helios' (sun) + 'gramma' (something written, a message).
: A message sent by reflecting sunlight with a heliograph (a mirror device).
: Heliogram is usually technical / historical in register.
: Heliogram: in British English it is pronounced /ˈhiːlɪə(ʊ)ɡram/, and in American English it is pronounced /ˈhiːlioʊˌɡræm/. Tap the audio buttons above to hear it.

Phrases

Idioms & Phrases

“None”

Learning

Memory Aids

Mnemonic

Think 'HELIOS' (Greek sun god) + 'GRAM' (message). A 'sun-message'.

Conceptual Metaphor

COMMUNICATION IS LIGHT; MESSAGE IS A REFLECTION.

Practice

Quiz

Fill in the gap

In the 19th century, a was a vital means of sending messages across deserts where telegraph lines couldn't reach.

Multiple Choice

What is a 'heliogram' most specifically?