noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Any of various strongly basic proteins of relatively low molecular weight that are rich in arginine and are found associated especially with DNA in place of histone in the sperm cells of various animals (such as fish).
2. 2
   a simple protein found in fish sperm; rich in arginine; simpler in composition than globulin or albumin; counteracts the anticoagulant effect of heparin wordnet

Synonyms

All synonyms

hemoglobinprotein

Etymology

From prot- (“original”) + -amine.

Related phrases

protamine sulfate

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.