latissimus dorsi
lowtechnical, scientific, medical
Definition
Meaning
A large, flat, paired muscle on the back, extending from the lower thoracic vertebrae to the humerus.
Refers specifically to this major back muscle, key in movements like adduction, extension, and internal rotation of the shoulder, and often referenced in anatomy, fitness, medicine, and bodybuilding.
Linguistics
Semantic Notes
Always used as a singular noun (plural: latissimi dorsi), but often referred to in the plural 'lats' in informal fitness contexts. The full term denotes anatomical precision; 'lats' is the colloquial reduction.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning. Pronunciation of 'dorsi' may slightly differ (/ˈdɔː.saɪ/ vs /ˈdɔːr.saɪ/). Spelling is identical.
Connotations
Neutral and technical in both varieties. The shortened form 'lats' is equally common in informal fitness registers in both regions.
Frequency
Equally low in general discourse, but higher frequency in specific contexts like gyms, physiotherapy, and anatomy classes in both the UK and US.
Vocabulary
Collocations
Grammar
Valency Patterns
The latissimus dorsi [verb of action: originates/inserts/extends/adducts]To target/engage/strengthen/strain the latissimus dorsiVocabulary
Synonyms
Neutral
Weak
Usage
Context Usage
Business
Rarely used. Possibly in contexts of ergonomic furniture design or workplace health.
Academic
Common in medical, anatomical, physiotherapy, sports science, and biology texts and lectures.
Everyday
Very rare in casual conversation. May appear in gym/fitness discussions as 'lats'.
Technical
The primary register. Used precisely in anatomy, surgery (e.g., latissimus dorsi flap reconstruction), physiotherapy, and strength training.
Examples
By CEFR Level
- He has a strong back.
- Exercises like pull-ups work the big back muscles.
- A lat pulldown exercise primarily targets the latissimus dorsi, which are the large V-shaped muscles in your back.
Learning
Memory Aids
Mnemonic
Imagine 'LATissimus' as the WIDEST ('latus' = wide in Latin) muscle on your DORsal (back) side.
Conceptual Metaphor
THE BACK AS A WING: The 'lats' are often metaphorically described as 'wings', especially in bodybuilding, due to their V-taper shape when developed.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate word-for-word as 'широчайшая спина'. The standard anatomical term in Russian is 'широчайшая мышца спины'. The short form 'крылья' ('wings') is a common gym analogy in both languages.
- The 'i' ending in 'dorsi' is the genitive singular, not a plural, so it means 'of the back'.
Common Mistakes
- Incorrect plural: 'latissimus dorsis' (correct: latissimi dorsi).
- Mispronunciation: stressing 'LA-tissimus' instead of 'la-TISS-imus'.
- Using 'latissimus dorsi' as a plural noun.
Practice
Quiz
What is the primary action of the latissimus dorsi?
FAQ
Frequently Asked Questions
It is singular. The plural is 'latissimi dorsi'. In casual fitness talk, the plural 'lats' is used.
In gyms, physiotherapy, and informal contexts, 'lats' is perfectly acceptable and common. Use the full term in formal medical or anatomical writing.
It is the broadest muscle of the back. It originates from the lower spine and iliac crest and inserts into the upper arm bone (humerus).
It is crucial for movements like pulling, climbing, and swimming. It also stabilizes the trunk and is used in surgical reconstructions due to its size and blood supply.