yūpa : [m.] a sacrificial post.

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

Yūpa [Vedic yūpa] 1. a sacrificial post D i.141; A iv.41; J iv.302; vi.211; Miln 21 (dhamma˚); SnA 321, 322; DA i.294. -- 2. a pāsāda, or palace Th 1, 163=Jii.334.
   -- ussāpana the erection of the sacr. post DhsA 145 (cp. Miln 21).

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