urochordate: meaning, definition, pronunciation and examples
Very LowScientific/Technical
Quick answer
What does “urochordate” mean?
A marine animal belonging to a group of primitive chordates, also known as tunicates or sea squirts, which possess a notochord (a flexible rod of cells) only in the larval tail stage.
Audio
Pronunciation
Definition
Meaning and Definition
A marine animal belonging to a group of primitive chordates, also known as tunicates or sea squirts, which possess a notochord (a flexible rod of cells) only in the larval tail stage.
Any member of the subphylum Urochordata, characterized by a sac-like adult body with two siphons for water flow, a cellulose-like tunic, and a free-swimming larval form that has chordate features (notochord, dorsal nerve cord) which are mostly lost during metamorphosis into the sessile adult.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or orthographic differences. Usage is identical in scientific contexts.
Connotations
Purely scientific and neutral in both dialects.
Frequency
Extremely rare outside marine biology, evolutionary biology, or zoology textbooks and papers. Frequency is equally minimal in both dialects.
Grammar
How to Use “urochordate” in a Sentence
Urochordates [verb: are, include, represent] a key group.The [noun: larva, anatomy, genome] of the urochordate was studied.Scientists classify/group/describe the organism as a urochordate.Vocabulary
Collocations
Examples
Examples of “urochordate” in a Sentence
adjective
British English
- The urochordate lineage provides crucial insights.
- Urochordate development was observed.
American English
- Urochordate anatomy is surprisingly complex.
- Researchers sequenced the urochordate genome.
Usage
Meaning in Context
Business
Not used.
Academic
Used in biology, zoology, and evolutionary science textbooks, journals, and lectures.
Everyday
Virtually never used in everyday conversation.
Technical
Core term in marine biology, invertebrate zoology, and phylogenetic research.
Vocabulary
Synonyms of “urochordate”
Strong
Neutral
Weak
Vocabulary
Antonyms of “urochordate”
Watch out
Common Mistakes When Using “urochordate”
- Misspelling as 'urochordata' (which is the subphylum name) or 'urochord'.
- Using 'urochordate' to refer to all chordates.
- Incorrect pronunciation stressing the first syllable (/ˈjʊərəˌkɔːrdeɪt/) instead of the third (/ˌjʊərəʊˈkɔːrdeɪt/).
FAQ
Frequently Asked Questions
No, urochordates are invertebrate chordates. They lack a true backbone or vertebrae.
They are commonly called tunicates or sea squirts.
They are studied as model organisms for understanding the evolution of chordates and vertebrates, as their larvae possess the basic chordate body plan.
No. While ascidians (sea squirts) are sessile as adults, other urochordates like larvaceans and thaliaceans remain free-swimming and gelatinous throughout life.
A marine animal belonging to a group of primitive chordates, also known as tunicates or sea squirts, which possess a notochord (a flexible rod of cells) only in the larval tail stage.
Urochordate is usually scientific/technical in register.
Urochordate: in British English it is pronounced /ˌjʊərəʊˈkɔːdeɪt/, and in American English it is pronounced /ˌjʊroʊˈkɔːrdeɪt/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “No common idioms exist for this technical term.”
Learning
Memory Aids
Mnemonic
Imagine a tiny sea creature with a U-shaped rod (Uro-) in its CHORD-like tail (-chordate) when it's young.
Conceptual Metaphor
A 'living fossil blueprint' for understanding the evolutionary transition from simple, sessile filter-feeders to active, complex vertebrates.
Practice
Quiz
What is a key characteristic of a urochordate?