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euploid

Low
UK/ˈjuːplɔɪd/US/ˈjuːplɔɪd/

Technical/Scientific

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Definition

Meaning

An organism or cell having a chromosome number that is an exact multiple of the haploid number (n). A normal, complete set of chromosomes.

In genetics and cytogenetics, referring to the condition of having a balanced, whole-number set of chromosomes, as opposed to aneuploidy (an abnormal number). The term can describe an organism, cell, or karyotype.

Linguistics

Semantic Notes

The term is primarily used in genetics, cytogenetics, and reproductive biology. It describes a normal, healthy chromosomal state. It is an absolute term; one is either euploid or not. Often used in contrast to 'aneuploid'.

Dialectal Variation

British vs American Usage

Differences

No significant differences in meaning or spelling. Pronunciation differs slightly (see IPA).

Connotations

Identical technical/scientific connotations in both varieties.

Frequency

Equally rare and specialised in both UK and US English, confined to technical fields.

Vocabulary

Collocations

strong
euploid celleuploid embryoeuploid stateeuploid complementeuploid karyotype
medium
found to be euploidtested euploideuploid vs aneuploideuploid conditionremain euploid
weak
completely euploidchromosomally euploidnormal euploid

Grammar

Valency Patterns

be + euploid (The embryo is euploid.)test/confirm/show + as euploidcompare + euploid + to/with + aneuploid

Vocabulary

Synonyms

Neutral

chromosomally normalwith a complete chromosome set

Weak

balanced

Vocabulary

Antonyms

aneuploidabnormal karyotypechromosomally abnormal

Usage

Context Usage

Academic

Common in genetics, biology, and medical research papers discussing chromosomal analysis.

Everyday

Virtually never used in everyday conversation.

Technical

Core term in reproductive medicine (e.g., IVF/PGT-A), cytogenetics, and plant breeding.

Examples

By Part of Speech

adjective

British English

  • The biopsy confirmed the tissue was euploid.
  • Researchers compared the development of euploid and aneuploid lines.

American English

  • The PGT-A report came back euploid.
  • Only euploid embryos were considered for transfer.

Examples

By CEFR Level

B2
  • A euploid cell has the correct number of chromosomes.
  • Down syndrome is caused by aneuploidy, not a euploid condition.
C1
  • Preimplantation genetic testing aims to identify euploid embryos for transfer, thereby increasing IVF success rates.
  • While the tumour appeared normal histologically, a karyotype revealed it was not euploid.

Learning

Memory Aids

Mnemonic

Think 'EU' as in good (from Greek 'eu-') and 'PLOID' as in chromosomes (like haploid, diploid). So, 'good chromosome number'.

Conceptual Metaphor

A FULL SET (like having all volumes of an encyclopedia, not missing or having extras).

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

  • Do not confuse with 'euploid' (spelling trap). Russian equivalent is 'эйплоидный' (ehyploidnyy).

Common Mistakes

  • Misspelling as 'euploidy' when using the adjective form (euploidy is the noun).
  • Using it to mean 'healthy' in a general, non-genetic sense.

Practice

Quiz

Fill in the gap
After genetic screening, the couple was relieved to learn their embryo was .
Multiple Choice

What is the primary antonym of 'euploid'?

FAQ

Frequently Asked Questions

Yes, somatic (body) cells are typically euploid and diploid (2n).

Absolutely. The term is used across biology for any organism with a complete, balanced set of chromosomes.

'Diploid' (2n) is a specific type of euploidy. 'Euploid' is the broader category meaning 'complete set', which includes haploid (n), diploid (2n), triploid (3n), etc.

Euploid embryos have a much higher chance of implanting successfully and leading to a healthy pregnancy than aneuploid embryos, which often result in miscarriage.