1. Plural of boiloff; the process or result of a liquid evaporating or being driven off by heat, especially the loss of cryogenic propellant from a rocket or spacecraft tank.
Usage: technical; aerospace

Examples

• The spacecraft engineers calculated the boiloffs of liquid hydrogen during the long mission.
• Boiloffs from the fuel tanks increased as the rocket sat on the launch pad in the hot sun.
• Cryogenic boiloffs are a major concern for deep-space missions lasting several months.
• The team implemented better insulation to minimize boiloffs of the liquid oxygen.
• Mission control monitored the boiloffs closely to ensure sufficient fuel remained for orbital insertion.