Acquisitiveness is a phrenological

Phrenology

Phrenology is a pseudoscience primarily focused on measurements of the human skull, based on the concept that the brain is the organ of the mind, and that certain brain areas have localized, specific functions or modules...

 faculty.

Definition

Acquisitiveness describes the greed to increase one's possessions, to acquire, hoard and save.
It can be aimed on material or immaterial fields, depending on the development of other faculties. It stands for the love of oneself's capital and is thus basically a self-centred faculty.

Interaction with other faculties

• Acquistiveness + Negative Conscientiousness: inclination towards theft and fraud
• Acquisitiveness + strong development of Moral faculties: quest for moral perfection
• Acquisitiveness + strong development of Intellectual faculties: quest for knowledge, academic titles,..
• Acquisitiveness + positive Constructiveness + positive Perceptive faculties: business and commercial propensity.