Phalanx

Anatomically, any one of the bones in the fingers or toes.

(Plural: phalanges.) There are 3 phalanges (the proximal, middle, and distal phalanx) in most of the fingers and toes.

However, the thumb and large toe have only two phalanges that accounts for their being shorter.

A 'phalanx' in ancient Greece was a military formation composed of heavily armed troops in close deep ranks.

The soldiers stood shoulder to shoulder, several rows deep, often with their shields joined.

A phalanx was a formidable group that was difficult to penetrate.

The bones in the fingers and toes were first called 'phalanges' by the Greek philosopher-scientist Aristotle (384-322 BC) because they are arranged in ranks suggesting the military formation.