Ragweedとは 意味・読み方・使い方

語源

From rag +‎ weed. Compare 中期英語 ragwed (“butcher's broom”). This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term. Semantics needed.

発音

• (General American) IPA: /ˈɹæɡˌwid/

名詞

ragweed (countable and uncountable, plural ragweeds)

1. A plant of the genus Ambrosia. These weeds are particularly noted for producing pollen that triggers hay fever.

   Synonym: ambrosia

   • 1916 September 16, W[illiam] Scheppegrell, “Direct and Indirect Hay-Fever: Preliminary Report of the Research Department of the American Hay-Fever-Prevention Association on the Etiology of Hay-Fever”, in George H[enry] Simmons, editor, The Journal of the American Medical Association, volume LXVII, number 12, Chicago, Ill.: American Medical Association, pages 862–863:

     Fig. 1.—Spiculated pollens of ragweeds (ambrosias) low in protein. […] In the cocklebur (Xanthium americanum) and the rough wild elder (Iva ciliata), the spicules are shorter, being 0.7 and 0.5 microns, and the reaction is proportionately less active than with the ragweeds (ambrosias). […] While the grass pollens have so light a coat that they are frequently crushed in the ordinary process of mounting, the ragweed (ambrosias) pollen grains resist pressure between two glass slides carried to the point of crushing the glass.

   • 2009 January 29, “The Leafs' Garden of Weedin'”, in Toronto Star‎:

     RAGWEED (Jeffogia Fingerolia) : The hayfever king, ragweed, brings tears to the eyes of grown men.

2. A summer cypress, mock cypress (Bassia scoparia).

派生語

• annual ragweed (Ambrosia artemisiifolia, Ambrosia trifida)
• coastal ragweed (Ambrosia hispida)
• common ragweed (Ambrosia artemisiifolia)
• common ragweed fruit fly (Euaresta bella)
• Cuman ragweed (Ambrosia psilostachya)
• dwarf bur ragweed (Ambrosia pumila)
• flatspine burr ragweed (Ambrosia acanthicarpa)
• giant ragweed (Ambrosia trifida)
• great ragweed (Ambrosia trifida)
• lacy ragweed (Ambrosia tenuifolia)
• lanceleaf ragweed (Ambrosia bidentata)
• minute ragweed borer (Epiblema minutana)
• perennial ragweed (Ambrosia psilostachya)
• Peruvian ragweed (Ambrosia peruviana)
• ragweed gall mite (Aceria boycei)
• ragweed borer moth (Epiblema strenuana)
• ragweed flower moth (Schinia rivulosa)
• ragweed leaf beetle (Ophraella communa, Calligrapha suturalis)
• ragweed plume moth (Adaina ambrosiae)
• ragweed weevil (Lixus scrobicollis)
• San Diego ragweed (Ambrosia pumila)
• silver burr ragweed (Ambrosia chamissonis)
• Tucson bur ragweed (Ambrosia cordifolia)
• weakleaf bur ragweed (Ambrosia confertiflora)
• western ragweed (Ambrosia psilostachya)

参照

アナグラム

• garweed, Edgware, wagered