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Results found in several dictionaries: Collins, Collaborative Dictionary
four-legged 
  adj à quatre pattes

Collaborative Dictionary     English-French
blue-legged exp. aux pattes bleues Reverso General Dictionary 
black-legged exp. aux pattes noires Reverso General Dictionary 
long-legged exp. 1) aux jambes longues, 2) aux longues pattes Reverso General Dictionary 
red-legged exp. aux pattes rouges Reverso General Dictionary 
white-legged exp. aux pattes blanches Reverso General Dictionary 
yellow-legged exp. aux pattes jaunes Reverso General Dictionary 
four-leaved clover n. le trèfle à quatre feuilles Reverso General Dictionary 
four years from now adj. d'ici quatre ans Reverso General Dictionary 
four-colour process n. la quadrichromie Reverso General Dictionary 
four-poster bed n. le lit à baldaquin Reverso General Dictionary 
four poster bed n. le lit à baldaquin Reverso General Dictionary 
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'four-legged' also found in translations in French-English dictionary
unijambiste n. 1) one-legged man (m), 2) one-legged woman (f) Reverso General Dictionary 
à pattes noires exp. black-legged Reverso General Dictionary 
quatre barré pref. coxed four Reverso General Dictionary 
à longues pattes exp. long-legged Reverso General Dictionary 
à pattes bleues exp. blue-legged Reverso General Dictionary 
quadrigramme pref. four-letter code Reverso General Dictionary 
à pattes blanches exp. white-legged Reverso General Dictionary 
à pattes jaunes exp. yellow-legged Reverso General Dictionary 
à pattes rouges exp. red-legged Reverso General Dictionary 
! four de revenu n. tempering furnace  

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