underbite
LowTechnical (medical/dental), sometimes informal
Definition
Meaning
A dental condition where the lower front teeth protrude beyond the upper front teeth.
More broadly, a type of jaw misalignment (malocclusion) characterized by the mandible (lower jaw) extending forward relative to the maxilla (upper jaw). Sometimes used figuratively to describe a facial structure or expression with a prominent or thrust-forward lower jaw.
Linguistics
Semantic Notes
Primarily a technical term in dentistry and orthodontics (Class III malocclusion). In informal contexts, it describes a facial feature rather than a diagnosed condition.
Dialectal Variation
British vs American Usage
Differences
No significant difference in core meaning or technical usage.
Connotations
In casual use, equally descriptive with no special regional connotation.
Frequency
Equally low frequency in both dialects, confined to dental/medical contexts or specific descriptive use.
Vocabulary
Collocations
Grammar
Valency Patterns
[patient] has an underbite[professional] corrected the underbiteThe underbite was [adjective]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None”
Usage
Context Usage
Business
Unlikely; only in specific contexts like medical device marketing or dental practice management.
Academic
Used in dentistry, orthodontics, medical anthropology, and veterinary science journals.
Everyday
Informal description of someone's appearance: "He has a bit of an underbite."
Technical
Standard term in dental diagnosis, orthodontic treatment planning, and oral surgery.
Examples
By Part of Speech
verb
British English
- The patient's lower jaw underbit significantly.
American English
- The condition causes the mandible to underbite.
adjective
British English
- He had an underbite jawline.
American English
- The underbite correction required surgery.
Examples
By CEFR Level
- The dog has an underbite.
- His underbite is easy to see.
- The dentist said I have a slight underbite.
- She is getting braces to fix her underbite.
- A severe underbite can cause problems with chewing and speech.
- Orthognathic surgery is sometimes needed to correct a major underbite.
- Mandibular prognathism, commonly referred to as an underbite, often has a genetic component.
- The orthodontist presented a treatment plan involving both braces and a Herbst appliance to address the patient's skeletal underbite.
Learning
Memory Aids
Mnemonic
Think: UNDER-bite - the lower (UNDER) teeth bite in front of the upper ones.
Conceptual Metaphor
POSITION AS HIERARCHY (Lower jaw/jawline is dominant/forward = 'under' is misleadingly 'over').
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct calques like 'подприкус' which is not a standard term. Use медицинский термин: 'прогнатия нижней челюсти' or 'неправильный прикус, при котором нижняя челюсть выступает вперёд'.
Common Mistakes
- Confusing with 'overbite'. Spelling as two words ('under bite').
Practice
Quiz
In which field is the term 'underbite' primarily a technical term?
FAQ
Frequently Asked Questions
Yes, an underbite is one specific type of 'bad bite' or malocclusion.
In children and mild cases, orthodontic treatment (braces, appliances) can often correct it. In adults with severe skeletal discrepancies, jaw surgery combined with orthodontics is usually required.
No. A true dental underbite involves only the teeth tipping. A skeletal underbite involves the actual position of the jawbones, which is more complex.
Yes. Certain dog breeds (e.g., Boxers, Bulldogs) are bred for a pronounced underbite (called 'undershot jaw'). It is also a condition seen in other species.