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+Apioforms are a somewhat heterogeneous group of apionic entities that occur within three-dimensional space at a large enough scale to be observed macroscopically (typically hundreds of metres or greater) and persistently. They differ from tesselating phenomena, such as apionic quasicrystals, by a lack of periodicity and repeating structure. The word "apioform" is derived from the words "apion" and "form", which together literally mean "apionic form" or "form of apions", referring to the apionic nature of most such structures. While all known apioforms are apionic, it is not certain that no non-apionic apioforms exist, although they would certainly be rare, because most known non-apionic structures are not large or complex enough to be considered apioforms.
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+Apioforms are distinct from smaller apionic structures such as apionic catalysts, which are apionic structures that can be created by human action to effect changes on apions in apionic fields, usually by rapid fluctuations or other forms of instability. Apioforms, in contrast, can only be reliably created by apionic megastabilization processes, which are not known to have ever occurred naturally or due to the influence of humans, or through rare, extremely high-energy processes such as apionic anabaptization. In some rare cases, they can be created by large-scale application of apionic catalysts, or certain materials with a negative apionic ratio. Very rarely, they can be created in response to large-scale human actions which usually involve the creation or elimination of large amounts of catalysts. Because of these facts, apioforms are a good example of an extremely low-probability but extremely high-consequence occurrence, similar to vacuum decay and other such phenomena.
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