ghamma : [m.] heat; the hot season.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

Ghamma [Vedic gharma=Gr. qermo/s, Lat. formus, Ohg. etc. warm; to *gṷher "warm," cp. Sk. ghṛṇoti, hara; Gr. qe/ros, etc.] heat; hot season, summer. Either in loc. ghamme J iv.172 (=gimha -- kāle); Pv iv.53 & ghammani ("in summer" or "by the heat") S i.143= J iii.360 (sampareta overcome by heat); Sn 353; J iv.239; v.3. -- Or. in cpd. with ˚abhitatta (ghammâbhitatta, overpowered by heat) M i.74; D ii.266; A iii.187 sq.; Sn 1014 (cp. 353 ghammatatta); Miln 318; VvA 40; PvA 114.

Pali-English Dictionary, TW Rhys Davids, William Stede,