Meanings

flexibility

double refraction

dorsiflexion

plantar flexion

tropism

to bow (of one's back, e.g. due to age)

sense of humiliation

hakama

bending from the hips with the legs straight and head nearly to the ground

to be reasonable

to find an excuse

quibble

elasticity

day of disgrace (in Okinawa; April 28, after the day in 1952 in which the US occupation of mainland Japan, but not Okinawa, ended)

refractive error

Viennese oyster (sexual position)

carefree

refractometer

inflected form

without any reason