ETYM French battant. Related to Batter.
1. Stick used to fix something in place, to hold it firm.
2. Slender stick inserted in the pocket of a sail to keep the sail flat against the wind.
An electronic module consisting of chips and other electronic components mounted on a flat, rigid substrate on which conductive paths are laid between the components. A personal computer contains a main board, called the motherboard, which usually has the microprocessor on it and slots into which other, smaller boards, called cards or adapters, can be plugged to expand the functionality of the main system, allowing connections to monitors, disk drives, or a network. See also adapter, card (definition 1), motherboard.
ETYM Old Eng. planke, Old Fren. planque, planche, French planche, from Latin planca; cf. Greek plax, anything flat and broad. Related to Planch.
An endorsed policy in the platform of a political party.
1. A continuous horizontal timber forming the lowest member of a framework or supporting structure.
2. (Geology) A flat (usually horizontal) mass of igneous rock between two layers of older sedimentary rock.
Sheet of igneous rock created by the intrusion of magma (molten rock) between layers of pre-existing rock. (A dyke, by contrast, is formed when magma cuts across layers of rock.) An example of a sill in the UK is the Great Whin Sill, which forms the ridge along which Hadrian’s Wall was built.
A sill is usually formed of diabase, a rock that is extremely resistant to erosion and weathering, and often forms ridges in the landscape or cuts across rivers to create waterfalls.