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precessional

precessional

1 9.9
A slow change in the direction of the line through a spinning object like a planet or gyroscope
  • adjective
  • /prɪˈsɛʃənl/
  • Specialized
: precesional
  • A precession control provides a demonstration of the 26,000-year precessional cycle of the Earth's polar axis.

Examples

  • Now I look at "My Red Hills" and think she must have felt that adrenaline flush of crossing wide country, knowing the land with the lift and fall of the foot, the movement of one's own shadow under the sun's high, precessional perspective, the slip and roll of loose ground tumbling downhill beneath as one steps and stumbles higher up.

    Academic text (2007)
  • The satellite's path is affected by the precessional motion, which must be accounted for in its trajectory calculations.

  • This is the so-called nutation period of the Moon and introduces a small periodic variation in the precessional motion of the axis of Earth.

    Academic text (2004)
  • The precessional alignment would suggest that the Holocene is nearing its end, while the obliquity alignment would suggest it has another 12,000 years to run its course.

    Blog text (33)
  • The highest-field NMR magnetic spectrometers produce 750 MHz precessional frequency for protons, corresponding to a 17.5-T magnet.

    Academic text (1994)
  • These cycles were directly tuned to the precessional component of the 65 N 21st June insolation curve using the La2004 orbital solution (Fig. 8; Laskar et al. 2004).

    Academic text (2018)
  • The gyroscope's precessional movement allows it to maintain its orientation despite external forces.

  • Astronomers studied the precessional changes in Earth's axis to understand climate patterns over millennia.

Antonyms

467 2.3

Not likely to change and stays steady over time

58 3.8

Not moving or changing over time

Surface Forms

precessional positive

Morphology

precessional = precession (transparent) = precess + ion + al

The adjective is formed regularly from the technical noun 'precession' with '-al', so its meaning is directly relational.

Etymology

The word precessional comes from the parts pre- meaning 'before' and cedere meaning 'to go', the same root you see in precede. So a precessional motion is the slow 'going before' or wobble of a spinning body's axis, which is why the word describes the slow shift of a planet or gyroscope.