cephalothorax: meaning, definition, pronunciation and examples
C2Scientific/Techical
Quick answer
What does “cephalothorax” mean?
The fused head and thorax region found in some arthropods, such as arachnids and crustaceans.
Audio
Pronunciation
Definition
Meaning and Definition
The fused head and thorax region found in some arthropods, such as arachnids and crustaceans.
In zoological anatomy, a major body division formed by the fusion of the head and thorax into a single unit, distinct from the abdomen.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning, spelling, or usage. It is an international scientific term.
Connotations
Neutral, purely descriptive scientific term in both varieties.
Frequency
Equally low-frequency and specialised in both UK and US English, confined to biological/zoological texts.
Grammar
How to Use “cephalothorax” in a Sentence
the cephalothorax of [animal][animal]'s cephalothoraxcephalothorax fused with [body part]Vocabulary
Collocations
Examples
Examples of “cephalothorax” in a Sentence
adjective
British English
- The cephalothoracic shield was examined.
- Cephalothoracic segmentation is a key feature.
American English
- The cephalothoracic region was dissected.
- Cephalothoracic appendages include the claws.
Usage
Meaning in Context
Business
Not used.
Academic
Used in zoology, biology, and arachnology textbooks and research papers.
Everyday
Virtually never used outside of specific educational or hobbyist contexts (e.g., spider enthusiasts).
Technical
The primary context. Used in taxonomic descriptions, anatomical studies, and field guides for arthropods.
Vocabulary
Synonyms of “cephalothorax”
Neutral
Weak
Vocabulary
Antonyms of “cephalothorax”
Watch out
Common Mistakes When Using “cephalothorax”
- Mispronouncing as /ˈkefələʊθɔːraks/ (hard 'c').
- Applying it to insects (incorrect).
- Misspelling as 'cephalathorax' or 'cephalthorax'.
FAQ
Frequently Asked Questions
No. It is characteristic of arachnids (spiders, scorpions) and many crustaceans (crabs, lobsters). Insects have three distinct body segments: head, thorax, and abdomen.
They are largely synonymous in arachnology. 'Prosoma' is sometimes preferred as it avoids the implication of two originally separate parts ('head' and 'thorax') that are now fused.
No. It is a specialised scientific term with very limited use outside zoology, biology, and related fields like veterinary science or paleontology.
It is often protected by a hard exoskeleton. In crustaceans, this is typically a large, shield-like plate called the carapace.
The fused head and thorax region found in some arthropods, such as arachnids and crustaceans.
Cephalothorax is usually scientific/techical in register.
Cephalothorax: in British English it is pronounced /ˌsɛfələ(ʊ)ˈθɔːraks/, and in American English it is pronounced /ˌsɛfəloʊˈθɔræks/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: 'Cephalo-' (head, like in 'cephalic') + 'thorax' (chest) = the 'head-chest' of a spider or crab.
Conceptual Metaphor
A UNIFIED COMMAND CENTRE (as it houses the main sensory organs and limbs).
Practice
Quiz
Which of these animals possesses a cephalothorax?