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Pertaining to summer. The corresponding adjectives for fall, winter, and spring are autumnal, hibernal and vernal.

Related Terms

PNEUMATIC CONTROL VALVE

A valve in which the force of compressed air against a diaphragm is opposed by the force of a spring to control the area of the opening for a fluid stream.

PARAMETRIC EXCITATION

The method of exciting and maintaining oscillations in either an electrical or mechanical dynamic system, in which excitation results from a periodic variation in an energy storage element in a system such as a capacitor, inductor, or spring constant.

LOCKING FASTENER

A fastening used to prevent loosening of a threaded fastener in service, for example, a seating lock, spring stop nut, interference wedge, blind, or quick release.

LIFTING DEVICE

A device to manually open a pressure relief valve by decreasing the spring loading in order to determine if the valve is in working order.

LATCH BOLT

A self-acting spring bolt with a beveled head.

LAMINATED SPRING

A flat or curved spring made of thin superimposed plates and forming a cantilever or beam of uniform strength.

KNIFE SWITCH

An electric switch consisting of a metal blade hinged at one end to a stationary jaw, so that the blade can be pushed over to make contact between spring clips.

NEAPED

Left aground following a spring high tide. Also called BENEAPED.

CONTRASTED

Winds a short distance apart blowing from opposite quadrants, frequent in the spring and fall in the western Mediterranean.

DURATION OF FLOOD

Duration of flood is the interval of time in which a tidal current is flooding, and the duration of ebb is the interval in which it is ebbing; these intervals being reckoned from the middle of the intervening slack waters or minimum cur- rents. Together they cover, on an average, a period of 12.42 hours for a semidiurnal tidal current or a period of 24.84 hours for a diurnal current. In a normal semidiurnal tidal current, the duration of flood and duration of ebb will each be approximately equal to 6.21 hours, but the times may be modified greatly by the presence of a nontidal flow. In a river the duration of ebb is usually longer than the duration of flood because of the fresh water discharge, especially during the spring months when snow and ice melt are the predominant influences.

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