There is nothing like ooma in Greek, there is soma, meaning body, and somation, which is a corpuscle.
σῶμα 1 deriv. uncertain
I. [select] the body of a man: in Hom. always the dead body, corpse, carcase, whereas the living body is δέμας.
2. [select] the living body, Hes., Hdt., attic; τὸ ς. σώζειν or -εσθαι to save one's life, Dem., Thuc.; ἔχειν τὸ ς. κακῶς, ὡς βέλτιστα, to be in a bad, a good state of body, Xen.
3. [select] body, as opp. to the soul (ψυχή), Plat., etc.; τὰ τοῦ ς. ἔργα bodily labours, Xen.; τὰ εἰς τὸ ς. τιμήματα bodily punishments, Aeschin.
II. [select] periphr., ἀνθρώπου σῶμα ῀ ἄνθρωπος, Hdt.; esp. in Trag., σῶμα θηρός ῀ ὁ θήρ, Soph., etc.:—often of slaves, ς. αἰχμάλωτα Dem., etc
III. [select] generally, a body, i. e. any material substance, Plat., etc.
IV. [select] the whole body or mass of a thing, ὑπὸ σώματι γῆς Aesch.; τὸ ς. τῆς πίστεως the body of the proof, Arist.
1 sw=ma, atos, to/,
σωμᾰ/τιον
σωμᾰ/τ-ιον, τό, Dim. of σῶμα,
small body, poor body, Isoc.Ep.4.11, Epicur.Fr.181, Gnathaena ap.Ath.13.584b, etc.; ἀσθένεια τοῦ ς. PHerc.1041.1; of a sick man's body, PCair.Zen.254 (iii B.C.), Gal.13.1025, cf. Agathin. ap. Orib.10.7.4; of an animal, Arist.Fr.339; of an infant, Sor.1.117.
corpse, Plu.2.119b, Pap.inStud.Ital.12(1935).99 (ii A.D.), PLips.30.13 (iii A.D.), Hdn.2.1.1.
slave, PSI6.602.2 (iii B.C.), PCair.Zen.93.11 (iii B.C.), PUniv.Giss.20.14 (ii A.D.), etc.
of things,
small body, corpuscle, Arist.de An.409a11, HA525a2.
pl., padding, used by actors to improve their figure, Pl. Com.256, Luc.JTr.41, Poll.2.235,4.115.
book, volume, Heraclit.All.1, Porph.Plot.26; structure of a poem, Longin.9.13.
text, opp. signature, PGen.11.18,68.18 (iv A.D.).
instalment of a sum due, PEleph.14.21 (iii B.C.).-σωμᾰτ-σωμάτειον is freq. v.l., cf. CIG2829.9, 2835.5 (Aphrodisias).
LSJ