A steel helmet (1950s+ Armed services)
noun Usage Note
noun (informal) something that is entertaining or enjoyable but lacks depth or significance
a neuron in the brain. Historical Examples The Promise James B. Hendryx Embryology Gerald R. Leighton Second Sight Sepharial Dangerous Ages Rose Macaulay Over the Teacups Oliver Wendell Holmes, Sr.
a product of one’s creative work or thought. Historical Examples Joan of the Journal Helen Diehl Olds The Master Mystery Arthur B. Reeve and John W. Grey Astounding Stories, July, 1931 Various noun (pl) -children (informal) an idea or plan produced by creative thought; invention n.