NUTATIONS
Noun
nutations
plural of nutation
Source: Wiktionary
NUTATION
Nu*ta"tion, n. Etym: [L. nutatio a nodding, fr. nutare to nod: cf. F.
nutation.]
1. The act of nodding.
So from the midmost the nutation spreads, Round and more round, o'er
all the sea of heads. Pope.
2. (Astron.)
Definition: A very small libratory motion of the earth's axis, by which its
inclination to the plane of the ecliptic is constantly varying by a
small amount.
3. (Bot.)
(a) The motion of a flower in following the apparent movement of the
sun, from the east in the morning to the west in the evening.
(b) Circumnutation.
Source: Webster’s Unabridged Dictionary 1913 Edition