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The vertical post of a derrick or crane. Afore the mast, Before the mast. See under Afore, and Before. -- Mast coat. See under Coat. -- Mast hoop, one of a number of hoops attached to the fore edge of a boom sail, which slip on the mast as the sail is raised or lowered; also, one of the iron hoops used in making a ma…

One of the vertical muscular radiating partitions which divide the body cavity of Anthozoa into chambers.

The median vertical plate, or median element, of the ethmoid bone.

The point of intersection of a vertical line through the center of gravity of the fluid displaced by a floating body which is tipped through a small angle from its position of equilibrium, and the inclined line which was vertical through the center of gravity of the body when in equilibrium.

A vertical water space in a fire box or combustion chamber.

handsaw at the proper angle in making a miter joint; esp., a wooden or metal trough with vertical kerfs in its upright sides, for guides. -- Miter dovetail (Carp.), a kind of dovetail for a miter joint in which there is only one joint line visible, and that at the angle. -- Miter gauge (Carp.), a gauge for determini…

tool holder, as for a lathe, shaped like a low turret, and capable of being revolved on a vertical pivot so as to bring successively the several tools in holds into proper position for cutting. Monitor top, the raised central portion, or clearstory, of a car roof, having low windows along its sides.…

capable of turning completely round in a horizontal plane and having a limited play in a vertical plane, used in hydraulic mining, fire-extinguishing apparatus, etc.

Having one oblique intersection; -- said of that system of crystallization in which the vertical axis is inclined to one, but at right angles to the other, lateral axis. See Crystallization.

Having parts, as leaves, arranged in many vertical rows.

A variety of diving bell, the lateral as well as vertical motions of which are controlled, by the occupants.

An inverted pendulum consisting of a short vertical flat spring which supports a rod having a bob at the top; -- used for detecting and measuring slight horizontal vibrations of a body to which it is attached.

In eight vertical ranks, as leaves on a stem.

A telescope with a diagonal eyepiece, suspended vertically in gimbals by the object end beneath a fixed diagonal plane mirror. It is used for delineating landscapes, by means of a pencil at the eye end which leaves the delineation on paper.

That which is orbiculate; especially, a solid the vertical section of which is oval, and the horizontal section circular.

"Orbital revolution." J. D. Forbes. Orbital index (Anat.), in the skull, the ratio of the vertical height to the transverse width of the orbit, which is taken as the standard, equal to 100.

cular panoramic view of the horizon. The photographic plate is placed horizontally with a vertical lens above. A mirror of peculiar shape reflects light from the entire horizon to the lens, by means of which it is focused upon the plate.

The diagonal or lateral axis in a monoclinic crystal which is at right angles with the vertical axis.

A drawing in correct projection, especially an elevation or a vertical section.

A name given to the two planes in the monoclinic system which are parallel to the vertical and orthodiagonal axes.