The quality or state of being algid; the characteristic of having a cold or cool quality.
From algid plus the Germanic suffix -ness, creating an alternative abstract noun to algidity. While both mean the same thing, -ness is more common in everyday English than the Latinate -ity ending.
In English, we often have two ways to say the same thing—'algidity' for formal medical writing, 'algidness' for literature—showing how languages keep old words alive by creating synonyms.
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