The word 'streptokinase' is a modern scientific compound, directly constructed from Greek-derived morphemes. The first part, 'strepto-', references the twisted chain formation characteristic of the streptococcus bacteria from which the enzyme is derived. The second part, '-kinase', identifies its function as an enzyme that activates another protein, specifically one involved in the movement or dissolution of fibrin in blood clots. Thus, the term's literal meaning, "twisted-chain enzyme," logically connects the bacterial source to its biochemical action of initiating clot breakdown.

Structure: strepto (twisted) + kinase (enzyme) 'strepto' is from Greek 'streptos', meaning 'twisted' or 'pliant', functioning as a combining form. 'kinase' is from Greek 'kinein', meaning 'to move', combined with the scientific suffix '-ase', denoting an enzyme.