antennia

Antennia is a neologism used in speculative contexts to refer to long-duration phenomena, artifacts, or biological or technological systems that operate across very long timescales—often far beyond human lifespans. The term has no single, accepted definition in science or philosophy.

Etymology and usage: The coinage likely derives from a blend of roots related to time and age. In many texts, antennia are imagined as either extremely long-lived organisms, enduring infrastructures, or theoretical constructs for storing or transmitting information through deep time. The plural form antennia is used in such writings to denote multiple instances or varieties.

In practice: In fiction, antennia may describe civilizations or machines that persist through collapses and eras, serving as reservoirs of knowledge. In speculative philosophy or futurism, they function as thought experiments about time perception, data longevity, and the scalability of life or intelligence.

Related terms and notes: Antennia should not be confused with antenna or antennae, which refer to physical appendages or sensors. The term remains nonstandard in scientific discourse, and its meaning varies by author or context. See also aeon or aion, longevity, time capsule, and deep time concepts.