If you have allergies, pregnancy can make your symptoms worse. But you're right to worry about taking allergy medicine during pregnancy. Pregnant women shouldn't take some allergy drugs. Certain antihistamines, however, are safe.
free radical. (chemistry). An atom or a diatomic or polyatomic molecule which possesses one unpaired electron. Also known as a radical.ree radical. in chemistry, a molecule or atom that contains an unpaired electron but is neither positively nor negatively charged. Free radicals are usually highly reactive and unstable.
A Chinese radical (Chinese: é¨é¦; pinyin: bushÇu; bÃ¹shÇu: literally section) header is a graphical component of A chinese character under which the character is traditionally listed in A chinese. dictionaryhe English term radical is based on an analogy between the structure of characters and inflection of words in European languages.