Definition: aphyllose (a pah-loh-say) is a root meaning "with or from an allergic reaction." The word has biblical roots, indicating it was used to describe the condition where someone's body reacts unexpectedly to an allergen, such as pollen or animal dander. Definition: - Anaphylaxis - A severe and life-threatening allergic reaction that occurs suddenly and can lead to serious breathing difficulties. - Apology (a pah-loh-say) - A word used in response to a mistake or apology.