en·do·thrix
ˈen-də-ˌthriks 
: an endothrix fungus of the genus Trichophyton (especially T. tonsurans)
: occurring within or penetrating the hair shaft
endothrix dermatophytes
also
: characterized by the presence of hyphae and arthroconidia within the hair shaft
endothrix tinea capitis
compare ectothrix
Cite this Entry
“Endothrix.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/endothrix. Accessed 4 Nov. 2025.
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