Samaya-sattva (Sanskrit). ‘Symbolic being’. In the course of tantric sādhanas, the practitioner generates an image of the focal deity—either as himself or in front—which is understood as a representation of that deity as a model for worship (pūjā) or personal transformation. The image is contrast to the actual presence of the deity, the jñāna-sattva.
In terms of kyérim―‘generation’ or ‘development phase’ of practice, the goal of which is to purify our perception into the purity of our inherent nature―samayasattva ( Tib. དམ་ཚིག་སེམས་དཔའ་ , Wyl. dam tshig sems dpa) ―commitment being―is when we arise in the form of the deity, having first practised the three samadhis.