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Webster 1913 Edition

Adj.

[L.

fructuosus

: cf, F.

fructueux

Fruitful; productive; profitable.

[Obs.]

–

Fruc′tu-ous-ly

adv.

–

Fruc′tu-ous-ness

Noun.

[Obs.]

Adj.

Fruitful; fertile; also, impregnating with fertility.

fructuous ‎(comparative more fructuous, superlative most fructuous)

(rare) fruitful
- 1589, Richard Hakluyt, The Principal Navigations, Voyages, Traffiques and Discoveries of the English Nation
  ... and there is a fulle fair vale and a fructuouse, and there is a fair cytee and a gode, that men clepen Neople.‎