lacrimal sac
Rare/TechnicalTechnical/Scientific
Definition
Meaning
The small, sac-like structure in the inner corner of the eye that collects tears from the lacrimal gland before they drain into the nasolacrimal duct.
In anatomy, the upper dilated end of the nasolacrimal duct, serving as a reservoir for tear fluid. In broader medical and anatomical contexts, it refers to a key component of the tear drainage system.
Linguistics
Semantic Notes
Used almost exclusively in medical, anatomical, and biological contexts. The term is highly specific and not part of general vocabulary.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. The term is spelled and used identically in both varieties. British English may be more likely to use the alternative spelling 'lacrymal sac' in historical or some specialist texts, but 'lacrimal' is standard in modern contexts.
Connotations
Purely denotative with no cultural or connotative differences. The term carries the same precise anatomical meaning in all English-speaking medical communities.
Frequency
Extremely low frequency in general language. Usage is confined to ophthalmology, anatomy, optometry, and related health sciences. Frequency is equal across varieties within those professional fields.
Vocabulary
Collocations
Grammar
Valency Patterns
The lacrimal sac [VERB: drains, collects, connects, leads to]Vocabulary
Synonyms
Strong
Neutral
Weak
Usage
Context Usage
Business
Never used.
Academic
Used in medical, biological, and health science textbooks, lectures, and research papers. Precision is paramount.
Everyday
Virtually never used. A layperson might refer to a 'tear duct'.
Technical
The primary context. Used in clinical diagnoses (e.g., 'dacryocystitis' is infection of the lacrimal sac), surgical reports, anatomical descriptions, and ophthalmological examinations.
Examples
By Part of Speech
noun
British English
- The infection had caused a painful swelling in the patient's lacrimal sac.
- A dacryocystorhinostomy is a surgical procedure to create a new drain from the lacrimal sac to the nasal cavity.
American English
- The ophthalmologist explained that the blockage was in the lacrimal sac.
- CT scan showed clear inflammation surrounding the left lacrimal sac.
Examples
By CEFR Level
- Tears drain from the eye into a small sac.
- The lacrimal sac is part of the system that drains tears from the surface of the eye.
- Dacryocystitis, an infection of the lacrimal sac, often presents with tenderness and swelling medial to the canthus.
Learning
Memory Aids
Mnemonic
Imagine a tiny 'sac' (bag) near your eye that's for 'lacrima' (Latin for tear). Lacrimal Sac = Tear Bag.
Conceptual Metaphor
CONTAINER (for tears), CONDUIT/PIPELINE (part of the drainage system).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- False friend: 'мешок' (meshok) meaning 'bag/sack' is a correct literal translation but sounds overly simplistic in a medical context. The standard Russian anatomical term is 'слезный мешок' (sleznyy meshok).
Common Mistakes
- Misspelling as 'lacrimal sack'.
- Confusing it with the 'lacrimal gland' (which produces tears) or the 'nasolacrimal duct' (which drains tears from the sac into the nose).
- Pronouncing 'lacrimal' with a hard 'c' (like 'k') instead of the soft 'c' (like 's').
Practice
Quiz
What is the primary function of the lacrimal sac?
FAQ
Frequently Asked Questions
No. The 'tear duct' is a common, non-specific term that usually refers to the entire drainage pathway. The lacrimal sac is one specific part of that system—the small, dilated pouch that collects tears before they pass down the nasolacrimal duct into the nose.
Normally, you cannot. It is a small internal structure. However, if it becomes infected or inflamed (a condition called dacryocystitis), it can swell and become tender and palpable at the inner corner of the eye.
It is a crucial site for diagnosing and treating obstructive and infectious disorders of the tear drainage system. Blockages here cause excessive tearing (epiphora) and can lead to serious infections.
Yes, most mammals possess a lacrimal sac as part of their nasolacrimal drainage system, though its size and exact anatomy can vary between species.