REZERVUAR (fransavigezeguoi, az lotini gezeguo — nigoh medoram), zarfhoi kalonhajmeand baroi nigoh doshtani moeot (ob, neft va mahsuloti on, mahlulhoi tekhnologi va gayra) va gazho. Rezervuarhoro ruizamini va zerizamini az ohan, ohanubeton, chub (baroi istifodan kutohmuddat) shaklash silindri, prizmavi, kuravi mesozand. Shakli silindriash beshtar mamul ast.
Dar sistemai tamini ob beshtar Rezervuarhoe istifoda meshavand, ki az masolehi binokorii masnu tayyor karda shudaand. Rezervuarhoi hajmashon to 2—3 hazor m3-ro (baroi ob) mudavvar va besh az 5— 6 hazor m3-ro rostkunja sokhtan sarfanoktar meboshad. Vobasta ba tainot va navi moddai zakhirashavanda Rezervuarhoro na garmivu nami izolyatsiya na-muda, devorahoi daruniashonro rukash mekunand (masalan, bo masolehi kislotabardor). Rezervuarho bo gulbahoi dokhilu khorij, sarpushho, giro nardbonho, garmkunak, klapanhoi muhofiz, oloti sofkori, armatura, saviyasanjho va gayra jihozonida meshavand. Nigared, Gavanbor.