[by means of concepts/conceptions]


opposite of: in concreto = in a concrete manner, concretely


it is generally NOT translated and stays the same in all languages :)


see:

On the other hand, he uses the terms 'concrete' and 'abstract' in the quidditative order to distinguish between two considerations of essence or nature: "… cum dicitur, Christus est aliquid quod non est Pater, ... aliquid tenetur non pro ipsa natura humana secundum quod significatur in abstracto [i.e., humanitas], sed secundum quod significatur in concreto [i.e., homo]....

http://www.bu.edu/wcp/Papers/Medi/MediToma.htm


hth