What is wug?

Some articles on wug, wugs:

Gu (poison) - Gu Meanings - Abdominal Wug Poisoning
... The "poisoning from abdominal wugs" or "abdominal parasites" meaning 2.1 first appears in the (121 CE) Shuowen Jiezi dictionary, cf ... gu 蠱 as 腹中蟲也, literally "stomach middle wug", (tr ... However, Duan Yucai's (1815 CE) commentary construes this definition as "afflicted by abdominal wugs" and explains that instead of the usual readings zh ...
Jean Berko Gleason - Wug Test
... Gleason is best known for having created the wug test, a test of children's knowledge of morphology ... that she designed, now known familiarly as a “Wug Test”, shows children simple pictures of appealing imaginary creatures and activities, and asks the child questions about them Here is ...
Gu (poison) - Gu Meanings
1) Poisoning from an abdominal wug (2) In ancient books, a type of artificially cultured poisonous wug (3) Ghost of a person whose decapitated head ...
Pseudoword - Characteristics
... Pseudowords are also sometimes called wug words in the context of linguistic experiments ... This is because wug was one such pseudoword used by Jean Berko Gleason in her wug test 1958 experiments ... Words like wug, which could have been a perfectly acceptable word in English but isn't due to an accidental gap, were presented to children ...