degression


de·gres·sion

D0101000 (dĭ-grĕsh′ən, dē-)n. A descent by stages or steps.
[Middle English, from Medieval Latin dēgressiō, dēgressiōn-, descent, from Latin dēgressus, past participle of dēgredī, to step down : dē-, de- + gradī, to step; see ghredh- in Indo-European roots.]
de·gres′sive adj.

degression

(dɪˈɡrɛʃən) n1. a decrease by stages2. (Economics) a gradual decrease in the tax rate on amounts below a specified sum[C15: from Medieval Latin dēgressiō descent, from Latin dēgredī to go down, from de- + gradī to take steps, go]