atrium (iou) and Fence - Equestrian Sports (gambling)

atrium (iou)

atrium noun. , -iums. L16.
[Latin.]
Architecture. A central court, orig. that of an ancient-Roman house; a covered court or portico; (a building with) a large light-well; a central hall or glassed-in court in a building. L16.
Anatomy & Zoology. Any of various chambers into which one or more passages open; spec. (a) either of the two upper chambers of the heart (in fish, a single chamber), into which the veins conduct blood (cf. AURICLE 1); (b) the tympanic chamber of the ear. L19.
atrial adjective (Anatomy & Zoology) of or pertaining to an atrium M19.
atrioven'tricular adjective (Anatomy) of or pertaining to the atrial and ventricular chambers of the heart;
atrioventricular bundle, a bundle of nerves leading from the right atrium to the ventricles and serving to maintain the heartbeat: L19.

Fence - Equestrian Sports (gambling)

A vertical obstacle. In show jumping, the maximum height is 1.6 meters, and the fence is often made of materials such as hedges, fake stone, brick, planks, and poles. In the three-day event, the fence is usually less than 1.2 meters high and it' s made of natural materials that fit into the terrain.

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