← Từ điển

annulus

C2 noun

annulus /ˈænjələs/ nghĩa là vật hình vành khăn, hình nhẫn

Các nghĩa

  1. vật hình vành khăn, hình nhẫn

    A ring- or donut-shaped area, object, or structure.

  2. vòng xơ, vòng sợi (tim)

    A ring of fibrous tissue; specifically (cardiology), such a ring around an opening of a heart valve, to which the valve leaflets and muscle fibres of the atria and ventricles are attached; an annulus fibrosus cordis.

  3. vành sáng (thiên thể, do nhật thực hình khuyên)

    A ring of light in a celestial body, especially when caused by an annular eclipse (for example, when the Sun and Moon are in line with the Earth, but the Moon does not completely cover the Sun's disc).

  4. vòng tế bào (ở túi bào tử dương xỉ, rêu)

    A structure surrounding a sporangium (or part of it) which shrinks and causes it to rupture for spore dispersal; specifically, in a fern: a structure around about two-thirds of the sporangium consisting of differentially thick-walled cells which dry and distort the sporangium; and in a moss: a complete ring of cells around the tip of the sporangium which dissolves to cause the tip to detach.

  5. vòng (trên thân nấm, tàn tích màng)

    The membranous remnants of a partial veil which leaves a ring on the stem of a mushroom.

  6. vòng năm (trên vảy cá)

    A dark ring on a fish's scale that is formed when a fish's growth rate slows down in the winter due to low food intake and the scale's circuli move closer to one another. The dark ring is used to estimate the fish's age, approximately one year per annulus.

+ 2 nghĩa khác

  1. hình vành khăn

    The region in a plane between two concentric circles of different radii.

  2. hình vành khăn (tô pô)

    Any topological space homeomorphic to the region in a plane between two concentric circles of different radii.

Dạng khác