hiemal

[hahy-uh-muh l] /ˈhaɪ ə məl/
adjective
1.
of or pertaining to winter; wintry.
Origin
1550-60; < Latin hiemālis pertaining to winter, equivalent to hiem(s) winter (akin to Greek chiṓn snow, cheimṓn winter, Sanskrit hima cold, frost, snow) + -ālis -al1; see hibernal
British Dictionary definitions for hiemal

hiemal

/ˈhaɪəməl/
adjective
1.
a less common word for hibernal
Word Origin
C16: from Latin hiems winter; see hibernate
Word Origin and History for hiemal
adj.

"pertaining to winter," 1550s, from Latin hiems "winter" (see hibernation).