An Etymological Dictionary of Astronomy and Astrophysics

1. A proposition put forward for consideration, especially one to be discussed and proved or to be maintained against objections.
   Philo.: The first of three stages in Hegelian dialectic; the inevitable transition of thought, by contradiction and reconciliation, from an initial conviction to its opposite and then to a new, higher conception that involves but transcends both of them. → antithesis; → synthesis.
   

2. A dissertation based on original research, especially as work toward an academic degree.

Etymology (EN): M.E., from L., from Gk. thesis “a proposition; a setting down, something set down,” from root of tithenai “to place, put, set,” cognate with Pers. dâdan “to give,” as below.

Etymology (PE): 1) Dâyan “giving, setting down,” from O.Pers./Av. dā- “to give, grant, put,” dadāiti “he gives;” Mid.Pers./Mod.Pers. dâdan “to give; to put”
(cf. Skt. dadáti “he gives;” Gk. tithenai “to place, put, set,” didomi “I give;”
L. dare “to give, offer;” Rus. delat’ “to do;” O.H.G. tuon, Ger. tun, O.E. don “to do;” PIE base *dhe- “to put, to do”)

• -y- epenthetic vowel + -an noun/adjective suffix appearing in many words (such as rowzan, mihan, barzan, rasan, barzan, rowšan).
  

2. Dâyan-nâme, from dâyan “thesis” + nâme “diploma, letter” (Mid.Pers. nâmag “book, letter, inscription,” from O.Pers./Av. nāman- “name;” cf. Skt. nama-;
   Gk. onoma, onuma; L. nomen; PIE *nomen-).
   Pâyân-nâme, literally “ending, final diploma,” from pâyân “end,” → terminal + nâme.