sidereal month
noun Astronomy.
See under month(def 5).
Origin of sidereal month
First recorded in 1865–70
Words nearby sidereal month
sidepiece,
sidereal,
sidereal day,
sidereal hour,
sidereal hour angle,
sidereal month,
sidereal period,
sidereal time,
sidereal year,
siderite,
sidero-
Definition for sidereal month (2 of 2)
month
[ muhnth ]
/ mʌnθ /
noun
Also called calendar month.
any of the twelve parts, as January or February, into which the calendar year is divided.
the time from any day of one calendar month to the corresponding day of the next.
a period of four weeks or 30 days.
Also called solar month.
one-twelfth of a solar or tropical year.
Also called lunar month.
the period of a complete revolution of the moon around the earth, as the period between successive new moons (synodic month), equal to 29.531 days, or the period between successive conjunctions with a star (sidereal month), equal to 27.322 days, or the period between successive perigees (anomalistic month), equal to 27.555 days, or the period between successive similar nodes (nodical month or draconic month), equal to 27.212 days.
an unusually long period of time of indefinite length: I haven't seen him for months.
Origin of month
before 900; Middle English; Old English
mōnath; cognate with Old High German
mānōd, Old Norse
mānathr. See
moon
British Dictionary definitions for sidereal month (1 of 2)
British Dictionary definitions for sidereal month (2 of 2)
month
/ (mʌnθ) /
noun
Other words from month
Related adjective: mensalWord Origin for month
Old English
mōnath; related to Old High German
mānōd, Old Norse
mānathr; compare Gothic
mena moon
Idioms and Phrases with sidereal month
month