NIRISS full form By jojo22 August 24, 2020 Full Form 0 Comments NIRISS full form Near-InfraRed Imager and Slitless Spectrograph Add a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment:*Name:* Email Address:* Website: Save my name, email, and website in this browser for the next time I comment. Δ