sol
C1Technical/Musical/Specialist
Definition
Meaning
The fifth note of a major scale in solfège (the fixed-do system), equivalent to 'G'.
In other contexts: 1) An informal clipping of 'solution' (e.g., a chemical sol). 2) A former French coin (short for sou). 3) The Roman sun god. 4) In astronomy, a solar day on Mars (used by NASA and scientists). 5) A colloidal solution.
Linguistics
Semantic Notes
The meaning is highly context-dependent. In general English, it is rare. Its most common contemporary uses are in music theory (technical) and Mars science journalism/NASA communications (specialist). As 'sol' for 'solution' it is informal scientific/engineering jargon.
Dialectal Variation
British vs American Usage
Differences
No significant difference in musical or scientific usage. The informal clipping 'sol' for 'solution' might be slightly more common in American lab/engineering slang.
Connotations
Neutral and technical in all contexts.
Frequency
Very low frequency in both varieties, slightly higher in AmE due to NASA and tech industry influence (e.g., 'Martian sol').
Vocabulary
Collocations
Grammar
Valency Patterns
Sing [the] solThe rover operated for [number] solsPrepare a 5% sol of [substance]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “Not for a king's sol (rare/archaic, based on the coin)”
- “From do to sol (rare, meaning from start to a midpoint)”
Usage
Context Usage
Business
Virtually never used.
Academic
Used in musicology papers and planetary science publications.
Everyday
Extremely rare, except among musicians or space enthusiasts.
Technical
Standard term in music theory and Mars mission planning/reporting.
Examples
By Part of Speech
verb
British English
- N/A
American English
- N/A
adverb
British English
- N/A
American English
- N/A
adjective
British English
- N/A
American English
- N/A
Examples
By CEFR Level
- The music teacher asked us to sing 'sol'.
- In the scale, 'sol' comes after 'fa' and before 'la'.
- The Mars rover's mission was extended by 50 sols due to its success.
- The pre-colloidal sol exhibited unusual rheological properties under stress.
Learning
Memory Aids
Mnemonic
SOLdier: A soldier marches to the beat, and 'Sol' is a note you march to in a scale.
Conceptual Metaphor
SOL AS A UNIT: A sol on Mars is a 'day', metaphorically extending the concept of a solar cycle to another world.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with Russian 'соль' (salt).
- Do not confuse with Spanish 'sol' (sun) in general translation contexts.
- In music, Russian 'соль' corresponds directly to English 'sol/G'.
Common Mistakes
- Pronouncing it like 'soul' (/soʊl/) in all contexts (in BrE for the note, it's /sɒl/).
- Using it to mean 'sun' in general English prose (poetic/archaic).
- Assuming it's a common word.
Practice
Quiz
In which field is the term 'sol' used to mean a standard unit of time?
FAQ
Frequently Asked Questions
No, it is a low-frequency, specialised term used primarily in music and planetary science.
In American English, it's often /soʊl/ (like 'sole'). In British English, it's traditionally /sɒl/ (like 'doll').
'Sol' is used in the 'Fixed Do' system (where C is always 'do'). 'So' is used in the 'Movable Do' system (where the tonic is always 'do').
Yes, but only as a proper noun for the Roman sun god (Sol), or in poetic/archaic contexts. In modern everyday English, use 'sun'.