実じっ験けん室しつ

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Meanings

A room or facility equipped for scientific experiments, research, or testing.

実じっ験けん室しつで〈事こと〉を行おこなうto carry out (an experiment, test, etc.) in the lab
学がく生せいたちは実じっ験けん室しつで化か学がく反はん応のうの実じっ験けんを行おこなった。
The students carried out a chemical reaction experiment in the lab.
実じっ験けん室しつに閉とじこもるto shut oneself away in the lab (working intensively)
彼かれは何なん日にちも実じっ験けん室しつに閉とじこもって研けん究きゅうを続つづけた。
He shut himself in the lab for days, continuing his research.
実じっ験けん室しつに入はいるto enter the laboratory
実じっ験けん室しつに入はいる前まえに白はく衣いを着きてください。
Please put on a lab coat before entering the laboratory.

研けん究きゅう室しつN4
研究室 often refers to a researcher's office or study space (sometimes with light experimentation), while 実験室 is specifically a room set up for conducting experiments.
ラボ
ラボ is a casual loanword for 'lab' used in everyday speech, while 実験室 is the standard, more formal Japanese term.
研けん究きゅう所じょ
実験室 specifically means the room where experiments are conducted, while 研究所 refers to the whole facility or organization doing research.
試し験けん場じょう
実験室 refers to a single laboratory room, while 試験場 can be a larger outdoor or multi-building testing facility.

教きょう室しつN5
教室 is a regular classroom for lessons, whereas 実験室 is a specially equipped room for scientific experiments, though both end in 室 and appear in school contexts.

Compound of 実験 (experiment) and 室 (room).