Printer Friendly
Dictionary, Encyclopedia and Thesaurus - The Free Dictionary
3,919,113,083 visitors served.
forum Join the Word of the Day Mailing List For webmasters
?
Dictionary/
thesaurus
Medical
dictionary
Legal
dictionary
Financial
dictionary
Acronyms
 
Idioms
Encyclopedia
Wikipedia
encyclopedia
?

umbo
(redirected from umbonal)

   Also found in: Dictionary/thesaurus, Encyclopedia 0.03 sec.
umbo /um·bo/ (um´bo) pl. umbo´nes   [L.]
1. a rounded elevation.
2. the slight projection at the center of the outer surface of the tympanic membrane.

um·bo (mb)
n. pl. um·bos or um·bo·nes (m-bnz)
A small anatomical projection on a surface, such as that on the inner surface of the tympanic membrane at the end of the manubrium of the malleus, corresponding to the most depressed point of the membrane.

umbo·nal (mb-nl, m-bnl), um·bonic (m-bnk) adj.

umbo
Etymology: L, knob
a projection on any rounded surface, such as the inner surface of the tympanic membrane where the malleus is attached.

umbo [um´bo] (L.)
1. a rounded elevation.
2. the slight projection at the center of the outer surface of the tympanic membrane.

umbo
pl. umbones [L.] a round projection.

umbo membrana tympanae
the slight projection at the center of the outer surface of the tympanic membrane.

umbo 
An area (0.15 mm-0.20 mm) in the centre of the foveola. Stimulation of this area results in the highest visual acuity.


Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content.
?Page tools
Printer friendly
Cite / link
Feedback
Add definition
Mentioned in?  References in periodicals archive?   Medical browser?   Full browser?
 
Results revealed that after four months larvae that had only reached the umbonal stage by Day 15 were significantly smaller than those that had reached the pediveliger stage.
Septalium and sessile septalium In general, the septalium is a trough-shaped structure in the umbonal region of the dorsal valve.
pyron in the lack of the dorsal sulcus, a smaller size and more regular shape of spines, greater number of spines and their presence in the umbonal region of the shell.
 
 
 
Medical Dictionary
?

Terms of Use | Privacy policy | Feedback | Advertise with Us | Copyright © 2012 Farlex, Inc.
Disclaimer
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.