See Also: Roche(dictionary)
roche(1)(dictionary)
roche(2)(dictionary)
Roche alum(medicine)
de la Roche, Mazo(encyclopedia)
Roche limit(encyclopedia)
Roche (as used in expressions)(encyclopedia)
tripe de roche(dictionary)
roche moutonnee(dictionary)
Roche Group(finance)

troat (iou) and Roche (iou)


troat (iou)



troat verb intrans. E17.
[Origin uncertain: cf. Old French trout, trut interjection for urging on hunting dogs etc.]
= BELL verb1 1.

Roche (iou)



Roche noun2. L19.
[Edouard Albert Roche (1820-83), French mathematician.]
Astronomy. Used attrib. & in possess. to designate concepts arising from Roche's work.
Roche limit (a) the closest distance to which a self-gravitating body can approach a more massive body without being pulled apart by the gravitational field of the latter; (b) the smallest continuous equipotential surface (having the form of two lobes meeting at a point) which can exist around both members of a system of two gravitating bodies, e.g. a binary star system. Roche lobe either of the two volumes of space bounded by the Roche limit around a binary system. Roche's limit = Roche limit above. Roche zone the region of space within the Roche limit of a single massive body.