umbilicus
umbilicus is defined in Webster's Unabridged Dictionary (1913) with 4 senses, and appears in Roget's Thesaurus (1911) with 40 related terms. The full text of each entry is reproduced verbatim below.
Definitions
- 1.(Gr. & Rom. Antiq.) An ornamented or painted ball or boss fastened at each end of the stick on which manuscripts were rolled. Dr. W. Smith.
- 2.(Bot.) The hilum.
- 3.(Zoöl.) (a) A depression or opening in the center of the base of many spiral shells. (b) Either one of the two apertures in the calamus of a feather.
- 4.(Geom.) (a) One of foci of an ellipse, or other curve. [Obs.] (b) A point of a surface at which the curvatures of the normal sections are all equal to each other. A sphere may be osculatory to the surface in every direction at an umbilicus. Called also umbilic.
Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
Synonyms
Related terms (Roget's 1911)
- axial
- axis
- azygous
- backbone
- bring
- buoyancy
- center
- central
- centrality
- centralization
- centralize
- centrally
- centrical
- column
- concentrate
- concentration
- concentric
- converge
- convergence
- core
- eye
- focal
- focus
- gravity
- heart
- hotbed
- kernel
- marrow
- metacenter
- middle
- middlemost
- midst
- nave
- navel
- nucleolus
- nucleus
- oscillation
- percussion
- pith
- pole
Source: Roget's Thesaurus, 1911 edition (public domain, via Project Gutenberg eBook #10681).
Related questions
Reverse-dictionary questions
Definition-first questions whose answer is umbilicus.
Sources
- Definitions: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
- Synonyms & antonyms: Roget's Thesaurus, 1911 edition (public domain, via Project Gutenberg eBook #10681).
- Canonical URL: https://worddirectanswers.com/word/umbilicus
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