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Webster 1913 Edition

Verb.

To curl up.

[R.]

Tennyson.

upcurl ‎(third-person singular simple present upcurls, present participle upcurling, simple past and past participle upcurled)

(transitive, rare) To curl up
- Alfred Tennyson
  And thro' the wreaths of floating dark upcurl'd, / Rare sunrise flow'd. / And Freedom rear'd in that august sunrise / Her beautiful bold brow […]

curl up