developer
nounmasculine/ʁɨvɨlɐˈdoɾ/medium
re·ve·la·dor
Definitions
1A chemical substance used in photography to make the latent image on film or photographic paper visible.
The film must be immersed in the developer for a specific time.
He mixed the developer solution carefully.
Common collocations
photographic developerdeveloper tank
2Making something previously unknown or secret evident.
The interview was revealing of his motives.
Her expression was very revealing.
Common collocations
revealing detailrevealing moment
Etymology
Do latim *revelator, -oris*, de *revelare* (revelar).