Fr.: 2062 Aten
The first → asteroid found to have an orbital → semi-major axis of less than one → astronomical unit. Discovered by the American woman astronomer Eleanor F. Helin (1932-2009) in 1982, it is the prototype of the → Aten asteroids.
Named after Aten, the Egyptian god of the solar disk.
Fr.: astéroïde Aten
A member of a class of → near-Earth asteroids with → perihelion distances between 0.983 and 1.0 → astronomical units. It is estimated that 6% of the total number of NEAs are Atens.
Fr.: aplatissement dynamique
A measure of the extent to which mass has been shifted from the polar regions of a (spinning) body toward its equator (Ellis et al., 2007, Planetary Ring Systems, Springer).
→ dynamic; → oblateness.
Present but not visible, apparent, or actualized; existing as potential (Dictionary.com). → latent heat.
From L. latentem (nominative latens), pr.p. of latere "to lie hidden."
Nahân "concealed, hid; clandestine;" Mid.Pers. nihân "secrecy, a secret place, a hiding place," nihânik "concealed;" Av. niδāti- "deposing, deposit."
garmâ-ye nahân (#)
Fr.: chaleur latente
The amount of → thermal energy that is absorbed or released by a unit amount of a substance in the process of a phase change under conditions of constant pressure and temperature.
The property possessed by a round body that is flattened at the poles.
Noun from → oblate.
Fr.: aplatissement optique
(polar flattening) The ratio of the difference between equatorial and polar diameters to the equatorial diameter. A sphere has an oblateness of 0; an infinitely thin disk has an oblateness of 1 (Ellis et al., 2007, Planetary Ring Systems, Springer).
→ optical; → oblateness.
1) To utter a threat against; menace.
From M.E. thretnen, from O.E. thrêatnian, → threat
Infinitive from harš, → threat.