“The Greek letter pi (3.1415965...) was, according to both Tegan and the First Doctor, the ratio...Pi
“Tautology was the unnecessary repetition of words that effectively meant the same thing. The...Tautology
“Lip-reading was the ability to understand what an individual was saying without hearing them...Lip-reading
“The Transient Beings were mentioned by the Fifth Doctor as having the necessary time sensitivity...Transient Being
“A Sacred Name was, according to Father Octavian, a name given to a member of the Church when...Sacred Name
“"Tellurian" was a term used by various aliens to refer to humans, or Earthlings specifically...Tellurian
This category has the following 4 subcategories, out of 4 total.