प्रत्यक्षदर्शिन्

Monier-Williams · pratyakṣadarśin
darśin mfn. seeing anything (gen.) with one's own eyes, one who has seen with his own eṭeyes MBh

विस्तृत संस्कृत–हिन्दी · adjective
येन स्वयं दृष्टम्।; "न्यायालये प्रत्यक्षदर्शिनं नैकान् प्रश्नान् पृष्टवान्।"