Retrograde

ret′rō-, or rē′trō-grād, adj. going backward: falling from better to worse: contrary: ( biol. ) becoming le highly organised, as 'a retrograde theory:' swimming backwards, as many animals: ( astron. ) moving westwards relatively to the fixed stars.— v.i. to go backwards.— ns. Retro gradā′tion , deterioration; Rē′trogre , falling off; Rētrogres′sion , a going backward: a decline in quality or merit.— adjs. Rētrogres′sional , Rētrogre ′ive .— adv. Rētrogre ′ively .— n. Rētrogre ′ivene . [L. retro gradus , going backward— retro , backward, grad i , gre us , to go.]