Where does “Pentagonica” come from?

Pentagonica (Translingual) comes from Latin pentagōnum, from Ancient Greek πεντάγωνον, from Ancient Greek πεντάγωνος, from Ancient Greek γωνία, from Ancient Greek γόνυ, from Proto-Hellenic gónu, from Proto-Indo-European ǵónu — knee.

Pentagonica (Translingual): genus|certain harpaline ground beetles}}

Definitions

genus|certain harpaline ground beetles}}

Ancestry of “Pentagonica”, step by step

Pentagonica traces back through two separate lines of ancestry.

via Latin pentagōnum

Step	Language	Word	Meaning
1	Latin	pentagōnum	pentaphyllon, cinquefoil
2	Ancient Greek	πεντάγωνον	pentagon
3	Ancient Greek	πεντάγωνος	five-angled
4	Ancient Greek	γωνία	corner, angle; joiner's square; cornerstone
5	Ancient Greek	γόνυ	knee
6	Proto-Hellenic	gónu	knee
7	Proto-Indo-European	ǵónu	knee

via Translingual [[-icus

Step	Language	Word	Meaning
1	Translingual	[[-icus	—

Every word from Proto-Indo-European ǵónu →Every word from Proto-Hellenic gónu →Every word from Ancient Greek γόνυ →