roofstoneとは 意味・読み方・使い方

発音

• enPR: ro͞of′stōn′, ro͝of-
• (Received Pronunciation) IPA: /ˈɹuːfˌstəʊ̯n/, /ˈɹʊf-/
• (General American, Canada) IPA: /ˈɹufˌstoʊ̯n/, /ˈɹʊf-/
• (General Australian) IPA: /ˈɹʉːfˌstəʉ̯n/, /ˈɹʊf-/
• (New Zealand) IPA: /ˈɹʉːfˌstɐʉ̯n/, /ˈɹʊf-/
• (Scotland) IPA: /ˈɹʉfˌston/, /ˈɹʉf-/
• (India) IPA: /ˈɾuːfˌsʈoːn/, /ˈɾʊf-/
• 韻: -uːfstəʊn, -ʊfstəʊn
• ハイフネーション: roof‧stone

名詞

roofstone (plural roofstones)

1. (geology, mining) The stone or rock layer immediately above a coal seam.
   • 1830, The Edinburgh Encyclopædia, volume 14, page 352:

     The intention of the props is for the security of the workmen to keep up the roofstone; they have no effect in resisting the crush of the super-incumbent strata.

2. (archaeology) A large, usually flat stone slab placed atop the side-stones (orthostats) of a megalithic burial chamber—such as in portal tombs, wedge tombs, or gallery graves—to form a roof covering the interior space.

   Coordinate terms: orthostat; roof tile

Further reading

• “roofstone”, in OneLook Dictionary Search.