A number of species, however, have a pseudotail consisting of a few postcloacal vertebrae, but annulation is incomplete and a terminal shield is consistently present.
Source: wiktionary
Pseudotail
Synonyms for "pseudotail"
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The spermatozoon of Saduria entomon is long and bent, resembling a whip. It consists of a very long pseudotail (1.86 mm long), which lacks an axoneme, and an extended head (112 pm long) that hangs down at an acute angle,” scientists in Poznan, Poland report.
Source: wiktionary
A true human tail (persistent vestigial tail) is rare and is differentiated from a pseudotail and an acrochordon by the presence of a central core of mature fatty tissue, small blood vessels, bundles of muscle fibers, and nerve fibers.
Source: wiktionary
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.