WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / B / blood serum blood serum noun /blədsirəm/ 2 syllables 11 letters Scrabble 15 WWF 19 Definitions noun an amber, watery fluid, rich in proteins, that separates out when blood coagulates serum Look “blood serum” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →