The spelling of the word "ectoentad" can be explained through its pronunciation using the International Phonetic Alphabet (IPA), which is /ɛktoʊɛntæd/. The word consists of four syllables: "ec-" pronounced as /ɛk/, "to-" as /toʊ/, "en-" as /ɛn/, and "-tad" as /tæd/. The stress is on the second syllable, which is pronounced as /oʊ/. This term is used in biology to describe the arrangement of hair-like structures on an insect's body directed towards the head.
There is no dictionary definition for the term "ectoentad."
Ectentad.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.