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Webster 1913 Edition

Adj.

[L.

hyemalis

, or better

hiemalis

, fr.

hyems

hiems

, winter: cf. F.

hyémal

Belonging to winter; done in winter.

Sir T. Browne.

Adj.

[L. hiems, winter.] Belonging to winter; done in winter.

hyemal ‎(comparative more hyemal, superlative most hyemal)

Belonging to winter; done in winter.
- 2015, Joshua Cohen, The Book of Numbers, page 519:
  "Break a hunk of ice off the land, crack off a chunk the same proportions as Manhattan Island, then slab Aar's emberous body on out, the winds floating a hyemal pyre melting toward the Pole."
(Can we find and add a quotation of Sir Thomas Browne to this entry?)