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[L. fr. Gr. ektasis, extension] Suffix meaning dilation or expansion.


(ek-tat′ik) Pert. to ectasia.


(ek″teth′moyd″) [ecto- + Gr. ēthmos, a strainer, sieve + -oid] Either of two lateral masses of the ethmoid bone. ectethmoid, adj.


(ek-thī′mă) [Gr. ekthyma, pimple] A crusting skin infection caused by pyogenic streptococci. It is similar to impetigo but extends more fully into the epidermis. Typically lesions are found on the shins or the dorsum of the feet.

TREATMENT: Topical skin cleansing, mupirocin ointment, and/or oral antibiotics (such as clindamycin) are needed to eradicate the infection.

e. gangrenosum ABBR: EG. Ecthyma caused by pyogenic streptococci or staphylococci. It is similar to impetigo but extends into the dermis. Lesions are typically found on the shins or the dorsum of the feet.


[Gr. ektos, outside] Prefix meaning outside.


(ek″tō-ant′ĭ-gĕn) [-ecto- + antigen] A surface antigen of bacteria that may be separated from them by agitation.


(ek′tŏ-blast″) [ecto- + -blast] 1. The outer layer of cells (epithelium) of an embryo. 2. The ectoderm. ectoblastic (ek″tŏ-blas′tik), adj.


(ĕk′tō-kăr′dē-ă) [″ + kardia, heart] Displacement of the heart.


(ĕk″tō-sĕr′vĭks) The portion of the canal of the uterine cervix that is lined with squamous epithelium. ectocervical (-sĕ′vĭ-kăl), adj.


(ek-tō-kū-nē′ĭ-form″) [ecto- + cuneiform] The most lateral of the three cuneiform bones.


(ĕk″tō-dăk′tĭl-ĭzm) [Gr. ektrosis, miscarriage, + daktylos, finger, + ismos, state of] Lack of a digit or digits.


(ek′tŏ-dĕrm″) [ecto- + derma] The outer layer of cells in an embryo. SYN: epiblast. SEE: endoderm; mesoderm. ectodermal, ectodermic (ek″tŏ-dĕrm′ăl, ek″tŏ-dĕrm′ik), adj.


(ek″tō-en′zīm″) [ecto- + enzyme] An enzyme that is linked to a cell membrane and catalyses reactions occurring in the spaces between cells. SEE: exoenzyme.


(ek′tŏ-morf″) [ecto- + -morph] A person with a body build marked by predominance of tissues derived from the ectoderm. The body is linear with sparse muscular development. SEE: endomorph; mesomorph; somatotype.


[Gr. ektomē, a cutting out + -ia] Suffix meaning surgical excision of an anatomical structure.


(ek″tō-par′ă-sīt″) [ecto- + parasite] A parasite that thrives in or on the skin, e.g., fleas, ...

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