IPA: /hɔːrˈmɒɡəniəm/
KK: /hɔrˈmɒɡəniəm/
A segment of a cyanobacterium filament that can separate and develop into a new filament through cell division.
The hormogonium can detach from the parent filament and grow into a new one.
Hormogonium is derived from "hormo-" (from Greek "hormē", meaning impulse or excitement) and "gonium" (from Greek "gonia", meaning angle or corner). The term refers to a segment of filamentous algae that can break off and grow into a new organism, reflecting the idea of an impulse to grow or reproduce at an angle.
Think of 'impulse' ('hormo-') driving growth or reproduction at an 'angle' ('gonium') — that's why a hormogonium is a segment that can grow into a new organism.