An Etymological Dictionary of Astronomy and Astrophysics

To move in a circle or spiral, or around a fixed point; to revolve in or as if in a spiral course. Close concepts: → revolve;
→ rotate; → spin. See also: → gyro-.

Etymology (EN): From L. gyratus, p.p. of gyrare “to turn around,” from L. gyrus “circle,” from Gk. gyros “circle, ring;” PIE base *geu- “to bend, curve.”

Etymology (PE): Leridan, from Lori, Laki lerr “revolving, whirling, turning” (lerr dâye “to make rotate, to stir a liquid,” lerese “to rotate, turn”), variant xer “circular, round” (xer dâyen “to make turn”), maybe cognate with Gk. gyros “circle, ring,” as above;
variants in Mod.Pers. lulé “rolled-up, wound-up; tube,” lulé kardan “to roll up, wind up;” Hamadâni lul “spiral, twisted;” Kurd. lûl “curly (of hair),” garda-lûl, ~ lûlân “wind that whirls dust.”

To move in a circle or spiral, or around a fixed point; to revolve in or as if in a spiral course. Close concepts: → revolve;
→ rotate; → spin. See also: → gyro-.

Etymology (EN): From L. gyratus, p.p. of gyrare “to turn around,” from L. gyrus “circle,” from Gk. gyros “circle, ring;” PIE base *geu- “to bend, curve.”

Etymology (PE): Leridan, from Lori, Laki lerr “revolving, whirling, turning” (lerr dâye “to make rotate, to stir a liquid,” lerese “to rotate, turn”), variant xer “circular, round” (xer dâyen “to make turn”), maybe cognate with Gk. gyros “circle, ring,” as above;
variants in Mod.Pers. lulé “rolled-up, wound-up; tube,” lulé kardan “to roll up, wind up;” Hamadâni lul “spiral, twisted;” Kurd. lûl “curly (of hair),” garda-lûl, ~ lûlân “wind that whirls dust.”

An open-source (adiabatic/non-adiabatic) pulsation code that calculates the oscillation frequencies of an input stellar model. The code is based on a “Magnus Multiple Shooting” scheme, which is a numerical technique to solve boundary value problems. This is done by subdividing the possible solution space into sub-intervals and solving the pulsation equation in these sub-intervals, assuming continuity conditions. GYRE is integrated into → Modules for Experiments in Stellar Astrophysics (MESA)’s → asteroseismologic module (Townsend & Teitler, 2013, MNRAS 435, 3406).

See also: GYRE, of unknown origin.

An open-source (adiabatic/non-adiabatic) pulsation code that calculates the oscillation frequencies of an input stellar model. The code is based on a “Magnus Multiple Shooting” scheme, which is a numerical technique to solve boundary value problems. This is done by subdividing the possible solution space into sub-intervals and solving the pulsation equation in these sub-intervals, assuming continuity conditions. GYRE is integrated into → Modules for Experiments in Stellar Astrophysics (MESA)’s → asteroseismologic module (Townsend & Teitler, 2013, MNRAS 435, 3406).

See also: GYRE, of unknown origin.

A combining form meaning “ring, circle, spiral,” used in the formation of compound words: → gyroscope, → gyrofrequency, → gyroradius, → gyrate.

Etymology (EN): From Gk. gyros “circle, ring;” PIE base *geu- “to bend, curve.”

Etymology (PE): From leridan, → gyrate.

A combining form meaning “ring, circle, spiral,” used in the formation of compound words: → gyroscope, → gyrofrequency, → gyroradius, → gyrate.

Etymology (EN): From Gk. gyros “circle, ring;” PIE base *geu- “to bend, curve.”

Etymology (PE): From leridan, → gyrate.

The frequency with which an electron or other charged particle executes spiral gyrations in moving across a magnetic field.

See also: → gyro-; → frequency.

The frequency with which an electron or other charged particle executes spiral gyrations in moving across a magnetic field.

See also: → gyro-; → frequency.

Same as → Larmor radius.

See also: → gyro-; → radius.

Same as → Larmor radius.

See also: → gyro-; → radius.

A device for measuring or maintaining orientation. Consisting of a rotating wheel so mounted that its axis can turn freely in certain or all directions, it is
based on the principle of conservation of angular momentum. In physics this is also known as gyroscopic inertia or rigidity in space.

Etymology (EN): Gyroscope, from gyro-, → gyrate + → -scope.

Etymology (PE): Lernemâ, from ler, → gyrate, + -nemâ→ -scope; carxešnemâ, from carxeš→ rotation + -nemâ.

A device for measuring or maintaining orientation. Consisting of a rotating wheel so mounted that its axis can turn freely in certain or all directions, it is
based on the principle of conservation of angular momentum. In physics this is also known as gyroscopic inertia or rigidity in space.

Etymology (EN): Gyroscope, from gyro-, → gyrate + → -scope.

Etymology (PE): Lernemâ, from ler, → gyrate, + -nemâ→ -scope; carxešnemâ, from carxeš→ rotation + -nemâ.