Sill



GRE

解释

GRE 红宝书

• n.基石; 门槛; 窗台
• ［英］ n.门槛 ( the threshold)
• ［记］ 联想记忆: silly去掉y

Webster Collegiate

noun

• Etymology: Middle English sille, from Old English syll; akin to Old High German swelli beam, threshold
• Date: before 12th century
• 1. a horizontal piece (as a timber) that forms the lowest member or one of the lowest members of a framework or supporting structure: as
  • a. the horizontal member at the base of a window
  • b. the threshold of a door
• 2. a tabular body of igneous rock injected while molten between sedimentary or volcanic beds or along foliation planes of metamorphic rocks
• 3. a submerged ridge at relatively shallow depth separating the basins of two bodies of water

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