INBOARD

adv. within or inside (a ship, plane, etc.)

adj. located inside (a ship, plane, etc.); located inside and near the center (of a ship, plane, etc.)

An inboard motor is a marine propulsion system for boats. As opposed to an outboard motor where an engine is mounted outside of the hull of the craft, an inboard motor is an engine enclosed within the hull of the boat, usually connected to a propulsion screw by a driveshaft.Inboard motors may be of several types, suitable for the size of craft they are fitted to. For pleasure craft, such as sailboats and speedboats, both diesel and petrol engines are used, though diesels are often preferred, as they are more efficient and pose less of a fire or explosion hazard in the air-tight environment of a boat's hull. In addition, diesels produce only small amounts of carbon monoxide gas, which can also collect in fatal amounts in and near the stern of marine craft.
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Adjective
1. located within the hull or nearest the midline of a vessel or aircraft; "the inboard flaps on the wing"
(antonym) outboard

(a. & adv.)
Inside the line of a vessel's bulwarks or hull; the opposite of outboard; as, an inboard cargo; haul the boom inboard.
  

(a. & adv.)
From without inward; toward the inside; as, the inboard stroke of a steam engine piston, the inward or return stroke.
  

inboard /'inbɔ:d/
tính từ & phó từ (hàng hải) ở phía trong, bên trong (tàu thuỷ...)an inboard cabin: cabin phía trongthe goods are placed inboard: hàng được xếp ở bên trong tàu (kỹ thuật) vào phía trong
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