Paykar, stroma (az yunoni stroma— farsh), 1) takyagoq, asos, bun (yo mehvar) -i uzvi organizmi hayvonot, ki az boftai nomukammali payvastkunanda iborat buda, dar on qismhoi khosi uzvho jon dorand.
Paykar inchunin khujayrahoi qobili afzoish va rupushi nakh-nakh dorad, ki ba takyagoh budani on imkon faroham meovarad. 2) Asosi safedai eritrositho. 3) Uzvi sporaovar 6 konidiyaovari aksari zanburughoi khaltador va nomukammal. 4) Asosi safedai plastidii obsabzho va rastanihoi darajai oli, ki dar on sistemai botartibi membranaho joygir shudaast.