haemocytometer
Very Rare (C2+ Technical)Technical/Medical/Scientific
Definition
Meaning
A microscope slide or device with a grid etched into it, used to count blood cells manually under a microscope.
A laboratory instrument, also known as a hemocytometer (US spelling), specifically designed for the quantitative analysis of cells in a fluid, most commonly blood cells in a diluted sample.
Linguistics
Semantic Notes
Specifically denotes a physical counting chamber. The process of counting is called 'haemocytometry'.
Dialectal Variation
British vs American Usage
Differences
Spelling: British English uses 'haemo-' and American English uses 'hemo-'. The British spelling retains the 'ae' digraph from its Greek origin.
Connotations
Identical technical connotations. The British spelling can appear more formal or traditionally academic in international contexts.
Frequency
The American spelling 'hemocytometer' is more frequent globally due to the predominance of US-published scientific literature.
Vocabulary
Collocations
Grammar
Valency Patterns
The technician used [a haemocytometer] to count [the white blood cells].Cell concentration was determined [using a haemocytometer].[A haemocytometer] consists of [a precise grid etched on glass].Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Rare; may appear in procurement for laboratories or medical device sales.
Academic
Common in biomedical sciences, hematology, microbiology, and cell culture laboratory manuals and research papers.
Everyday
Virtually never used.
Technical
The primary domain of use. Standard equipment in clinical labs, research labs, and quality control in biotechnology.
Examples
By Part of Speech
adjective
British English
- The haemocytometer count was verified.
- Follow the haemocytometer protocol.
American English
- The hemocytometer count was verified.
- Follow the hemocytometer protocol.
Examples
By CEFR Level
- In biology class, we learned how to count cells using a special glass slide called a haemocytometer.
- The lab report required data from the haemocytometer.
- Despite the availability of automated analysers, the manual haemocytometer remains the gold standard for validating cell counts in research.
- A 10 µl aliquot of the trypan blue-stained suspension was loaded onto the improved Neubauer haemocytometer for viable cell enumeration.
Learning
Memory Aids
Mnemonic
Think: 'HAEMO' (blood) + 'CYTO' (cell) + 'METER' (measurer). It's a 'blood-cell-measurer'.
Conceptual Metaphor
A GRIDDED MAP FOR CELLS (the etched grid is like a map on which cells are located and counted).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'гемометр' (haemometer), which measures hemoglobin. A haemocytometer is 'гемоцитометр' or more commonly 'камера Горяева' (Goryaev's chamber).
- The 'counting' function is implicit in the device; no separate word for 'counter' is needed in translation.
Common Mistakes
- Misspelling: 'hemacytometer', 'haemocytometre'.
- Confusing it with a tool for measuring hemoglobin (hemocytometer is for cell *counts*, not hemoglobin *concentration*).
- Using it as a verb (e.g., 'We will haemocytometer the sample' is incorrect).
Practice
Quiz
What is the primary difference between the British and American English terms for this device?
FAQ
Frequently Asked Questions
No, while designed for blood (haemo-), it is ubiquitously used in labs to count any type of cell in suspension, such as yeast, bacteria (in a Petroff-Hausser chamber), or cultured mammalian cells.
It is considered a reliable, direct reference method. It is low-cost, requires no calibration, can distinguish between viable and non-viable cells (with a dye like trypan blue), and is essential for counting cells that automated analyzers may struggle with (e.g., certain cell cultures, very low concentrations).
The grid (often a Neubauer improved pattern) defines precise, known volumes. By counting the cells within specific squares and applying a dilution factor, one can calculate the concentration of cells per millilitre of the original sample.
Yes, 'haemocytometry' refers to the technique or process of counting cells using a haemocytometer. The act itself is 'performing a haemocytometer count' or 'counting cells with a haemocytometer'.