Anything that is latent.
The residue left by a person's finger that can be made visible by a process such as powder dusting; a latent fingerprint.
An underlying cause that can be inferred from statistical correlations; factor.
Remaining in an inactive or hidden phase; dormant.
Lying dormant or hidden until circumstances are suitable for development or manifestation.
Existing or present but concealed or inactive.
The concept or idea evoked by a sign.