From the Latin word aprīcus, "warmed by the sun," apricity is a noun meaning "the warmth of the sun in winter." It's the type of hyper-specific word for a poetic concept that I just love to discover. It just sounds like a word that belongs in a Shakespearean sonnet.
Apricity led me on an exploration of other little-used winter-weather words, like psychrophile, chionoblepsia, and frigorific. I wrote about these an a gaggle of others yesterday on Copyediting.com in a post called "Underused Words for Winter Weather." Check it out.
* Thanks, Mom.