What does clotter mean?
Clotter is a relatively uncommon noun for a clot or lump, especially a mass of blood that has thickened and solidified. In its best-attested use, it names the material that has coagulated rather than the process itself: clotting is the action, while a clotter is the resulting mass. The word is chiefly associated with British use and is much less frequent in ordinary speech than clot, which is the standard term in medicine and everyday conversation. Clotter can also be understood more broadly as a lump or mass that has formed by thickening. Because it is rare, it is more likely to appear in formal writing, technical description, or language-learning materials than in spontaneous conversation. Its main value is lexical rather than stylistic: it provides an explicit noun for a coagulated mass while preserving the related verb clot and the related forms clotted and clotting.
nounA clotter is a mass or lump, especially a mass of blood that has thickened and solidified into a clot.
- A mass or lump formed by coagulation, especially a blood clot.
"The ultrasound revealed a small clotter attached to the blood vessel."
"The ultrasound revealed a small clotter attached to the blood vessel."
"As the mixture cooled, a thick clotter formed in the centre."
The regular plural is clotters, although the word's rarity makes the plural uncommon in practice.
"Several small clotters were detected during the scan."
Before reaching for the familiar “clot,” spare a thought for “clotter”—the rare noun for the mass that blood becomes when it thickens.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does clotter come from?
Clotter is an English formation based on clot and the productive suffix -er, which is used to create nouns associated with an action or its result. Clot comes through Middle English from Old English clotte, an older word for a lump or mass. The related forms clotted and clotting continue the same English verbal family, while clotter survives as a relatively uncommon noun.
Related word forms
How clotter is actually used
Relatively rare in modern English and chiefly associated with British usage; clot is overwhelmingly preferred in American English and in ordinary medical discussion. The word is neutral but somewhat technical in tone.
Easily confused with clotter
A clot is the standard word for a lump of clotted blood or other material, whereas clotter is a less common noun synonym.