nutation
n. தலையாட்டம், (தாவ.) வளர் நுனித்தண்டின் வளைவு, (வான்.) நிலவுலக ஊடச்சின் சிற்றூசலாட்டம்.
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.) Defn: 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.