noun, plural flo·ras, flo·rae [flawr-ee, flohr-ee] /ˈflɔr i, ˈfloʊr i/ for 2.

  1. the plants of a particular region or period, listed by species and considered as a whole.
  2. a work systematically describing such plants.
  3. plants, as distinguished from fauna.
  4. the aggregate of bacteria, fungi, and other microorganisms normally occurring on or in the bodies of humans and other animals: intestinal flora.


  1. a female given name.

noun plural -ras or -rae (-riː)

  1. all the plant life of a given place or time
  2. a descriptive list of such plants, often including a key for identification
  3. short for intestinal flora


  1. the Roman goddess of flowers

1777, “the plant life of a region or epoch,” from Latin Flora, Roman goddess of flowers, from flos (genitive floris) “flower,” from *flo-s-, Italic suffixed form of PIE *bhle- “to blossom, flourish” (cf. Middle Irish blath, Welsh blawd “blossom, flower,” Old English blowan “to flower, bloom”), extended form of *bhel- (3) “to thrive, bloom,” possibly identical with *bhel- (2) “to blow, swell” (see bole). Used as the title of descriptive plant catalogues since 1640s, but popularized by Linnaeus in his 1745 study of Swedish plants, “Flora Suecica.”

n. pl. flo•ras

  1. Plants considered as a group.
  2. The microorganisms that normally inhabit a bodily organ or part.

Plural floras florae (flôrē′)

  1. The plants of a particular region or time period.
  2. The bacteria and other microorganisms that normally inhabit a bodily organ or part, such as the intestine.

Plants, especially the plants of a particular place and time.

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