abracadabra
span role='text' aria-label='sense 3a'> : a concave junction formed where two surfaces meet (as at an angle)
: a strip that gives a rounded appearance to such a junction
also : a strip to reinforce the corner where two surfaces meet
: a narrow flat architectural member:
: a flat molding separating others
: the space between two flutings (see flute entry 1 sense 3) in a shaft