annuluses

英[ə'nʌljuːzɪz] 美[ə'nʌljuːzɪz]
  • n.环带物(环形套筒;圆;圈)
名词 annulus:
  1. a toroidal shape

  2. (Fungi) a remnant of the partial veil that in mature mushrooms surrounds the stem like a collar