Meanings

concave angle

angle at the circumference

to mellow

rhinoceros horn

prismatic shape

large square winter shawl

horn silver

horn-rimmed glasses

horn-rimmed glasses

playing shogi with a handicap of the rook and bishop

corner

hour angle

exfoliation

isogonic line

constant angular velocity

equiangular triangle

equiangular triangle

isoclinic line

lower triangular matrix

principal diagonal