What do annular means?
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What do annular means?
forming a ring
Definition of annular : of, relating to, or forming a ring an annular skin lesion.
What does annular mean in anatomy?
A ringlike structure
Annulus: A ringlike structure, or any body part that is shaped like a ring. Applied to many small ring-shaped structures. The base of a heart valve that supports the valve’s leaflets is called the annulus. A ring-shaped pancreas that encircles the duodenum is an annular pancreas.
What does annular shape mean?
ring-shaped
British Dictionary definitions for annular annular. / (ˈænjʊlə) / adjective. ring-shaped; of or forming a ring.
Where does the word annular come from?
annular (adj.) “ring-shaped,” 1570s, from French annulaire (16c.) or directly from Medieval Latin annularis “pertaining to a ring,” from annulus, misspelled diminutive of Latin anus “ring” (see anus).
What is annular region?
An annular region is a set of the form {x ∈ R n : r 0 < ∈x ∈ < r 1}; here r 0 ∈ [0, ∞) and r 1 ∈ (0, ∞]. Thus an annular region is the region between two concentric spheres, or is a punctured ball, or is the complement of a closed ball, or is R n \ {0}.
What is annular carcinoma?
A term of art referring to a malignancy (most commonly an adenocarcinoma arising in the colonic mucosa) that grows centripetally, forming what radiologists commonly call an apple core lesion and pathologists more often refer to as a napkin ring lesion.
What is an annulus in heart?
The aortic annulus is a fibrous ring at the aortic orifice to the front and right of the atrioventricular aortic valve and is considered the transition point between the left ventricle and aortic root. The annulus is part of the fibrous skeleton of the heart.
What is an annular valve?
Annular valve. Annular valves are suitable for regulating flow and pressure. They are prepared to work against all column water pressure without cavitation. The closure member has conical shape, and it moves in the axial direction of the tube. The flow goes around the closure member when the valve is open.
Does annular mean circular?
In mathematics, an annulus (plural annuli or annuluses) is the region between two concentric circles. Informally, it is shaped like a ring or a hardware washer. The word “annulus” is borrowed from the Latin word anulus or annulus meaning ‘little ring’. The adjectival form is annular (as in annular eclipse).
What are annular skin lesions?
DEFINITION. Annular skin lesions are figurate lesions characterized by a ring-like morphology. Although plaques represent the most common presentation of annular lesions, lesions may also be macular, nodular, or composed of grouped papules, vesicles, or pustules.
What is an annular solar eclipse?
An annular solar eclipse happens when the Moon passes between the Sun and Earth, but while the Moon is at its farthest point from Earth. Because the Moon is farther away from Earth, it appears smaller and does not block the entire face of the Sun.
What is the function of annulus?
An annulus in botany is an arc or a ring of specialized cells on the sporangium. These cells are arranged in a single row, and are associated with the release or dispersal of spores.
Where is mitral annular?
The mitral annulus is a ring like structure that separates the top and bottom chambers of the left side of the heart. The left side of the heart is the main pumping side. The upper chamber is the left atrium that collects blood returning from the lungs.
What is an annular rupture?
“Annular rupture” (or “annulus rupture”) is an umbrella term covering different procedural-related injuries that may occur in the region of the aortic root and the left ventricular outflow tract (LVOT) during transcatheter aortic valve replacement.
What is the circle with holes called?
An annulus is a flat ring shaped object, much like the throw-ring shown on the right. One way to think of it is a circular disk with a circular hole in it. The outer and inner circles that define the ring are concentric (share a common center point).
What does a circle with a hole in the middle mean?
In mathematics, a toroid is a surface of revolution with a hole in the middle.
