Platelet

Part of speech: noun

Pronunciation: /ˈpleɪt.lət/

Definitions

1. A small, colorless cell fragment in blood that helps form clots to stop bleeding when blood vessels are injured
2. A tiny, disc-shaped component of blood that plays a crucial role in clot formation and the healing process after vascular damage
3. A fragment of a cell found in blood, essential for the coagulation process to prevent excessive bleeding by sticking to injured vessels

Etymology: The word is built from "plate" plus the diminutive suffix "-let," so its literal sense is "little plate." "Plate" traces back through Old French "plate" and Vulgar Latin "platta" to Ancient Greek "platús," meaning broad or flat, which is why the root describes something spread out rather than something thick. English "-let" comes from Old French "-elet," a diminutive ending that also gives us words like "booklet" and "droplet," where it marks something small. The name is a plain description rather than a coinage with a story behind it. The cells were named for their flat, disc-like shape, which was a natural way to describe what microscopes showed. The word is a compound of familiar English parts, so its history is mostly the history of those two pieces.