Noun
a bubble of air
Source: WordNetAdult crawling water beetles use both their elytra and their hind coxae (the basal segment of the back legs) in air retention, citation while whirligig beetles simply carry an air bubble down with them whenever they dive. Source: Internet
An embolism is where an air bubble is created in a tracheid. Source: Internet
Huygens reported an effect he termed "anomalous suspension", in which water appeared to levitate in a glass jar inside his air pump (in fact suspended over an air bubble), but Boyle and Hooke could not replicate this phenomenon in their own pumps. Source: Internet
GIFT involves collecting sperm after the marital act, placing it near an egg – but separated by an air bubble – within a thin, flexible tube called a catheter. Source: Internet
If too much air becomes trapped in the concrete as a result of the mixing process, Defoamers can be used to encourage the air bubble to agglomerate, rise to the surface of the wet concrete and then disperse. Source: Internet
They labored in an air bubble, like that created when a drinking glass is submerged upside down. Source: Internet