Undulatory-theory
noun, Physics.
1.
wave theory (def 1).
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adverb 1. excessively: unduly worried. 2. in an inappropriate, unjustifiable, or improper manner: unduly critical. adverb 1. immoderately; excessively 2. in contradiction of moral or legal standards
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noun 1. a copy exactly like an original. 2. anything corresponding in all respects to something else. 3. Cards. a duplicate game. verb (used with object), duplicated, duplicating. 4. to make an exact copy of. 5. to do or perform again; repeat: He duplicated his father’s way of standing with his hands in his pockets. […]
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adjective 1. able to resist wear, decay, etc., well; lasting; enduring. noun 2. durables, durable goods. adjective 1. long-lasting; enduring: a durable fabric
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adjective 1. performing the duties expected or required of one; characterized by doing one’s duty: a dutiful citizen; a dutiful child. 2. required by duty; proceeding from or expressive of a sense of duty: dutiful attention. adjective 1. exhibiting or having a sense of duty 2. characterized by or resulting from a sense of duty: […]