| neurasthenic helmet | A feeling of pressure over the entire cranium in certain cases of neurasthenia. (05 Mar 2000) |
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| helmet | 1. A defensive covering for the head. See Casque, Headpiece, Morion, Sallet, and Illust. Of Beaver. 2. The representation of a helmet over shields or coats of arms, denoting gradations of rank by modifications of form. 3. A helmet-shaped hat, made of cork, felt, metal, or other suitable material, worn as part of the uniform of soldiers, firemen, etc, also worn in hot countries as a protection from the heat of the sun. 4. That which resembles a helmet in form, position, etc. <chemistry> As: The upper part of a retort. <botany> A naked shield or protuberance on the top or fore part of the head of a bird. Helmet beetle, an African wood shrike of the genus Prionodon, having a large crest. Origin: OF. Helmet, a dim of helme, F. Heaume; of Teutonic origin; cf. G. Helm, akin to AS. & OS. Helm, D. Helm, helmet, Icel. Hjalmr, Sw. Hjelm, Dan. Hielm, Goth. Hilms; and prob. From the root of AS. Helan to hide, to hele; cf. Also Lith. Szalmas, Russ. Shleme, Skr. Carman protection. Cf. Hele, Hell, Helm a helmet. Source: Websters Dictionary (01 Mar 1998) |
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| helmet cell | A schistocyte shaped like a military helmet. (05 Mar 2000) |
| neurasthenic | Relating to, or suffering from, neurasthenia. (05 Mar 2000) |
| neurasthenic personality | An obsolete term for a condition characterised by some of the following features: poor appetite or overeating, insomnia or hypersomnia, low energy or fatigue, low self esteem, poor concentration or difficulty making decisions, and feelings of hopelessness. In its most severe form it may become a chronic disturbance of mood called dysthymia (depressive neurosis) in which a depressive mood accompanies the features listed above. (05 Mar 2000) |