The word "tethelin" can be spelled using the International Phonetic Alphabet (IPA) as /ˈtɛθəliːn/. This word is made up of two syllables, with the stress falling on the second syllable. The phonemes used in this word are represented by the letters "t", "e", "th", "l", "i", and "n". The "th" in "tethelin" is pronounced as a voiceless dental fricative, similar to the "th" in "think". Overall, the spelling of "tethelin" accurately represents its pronunciation using the IPA.
The growth-controlling principle isolated from the anterior lobe of the hypophysis cerebri; pitglandin.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.