plytt, plytet

Middle English forms of plight. P. M. An abbreviation: ( a ) of post meridiem, 'after noon or midday' (also P. M., p. m.): frequently used as synonymous with afternoon or evening; ( b ) of postmaster; ( c ) of peculiar meter. + counterpoised semi-disk of tale, which is moved by the breath when held in front of the mouth. The disk carries a needle, which makes a tracing on smoked paper caused to move uniformly in relation with the needle. The tracings indicate by their undulations the character of the expiratory movement, from which the condition of the lungs may be inferred. pneometer (nē-om'e-tèr), n. [Irreg. pneoscope (nē'ō-skop), n. [Irreg. rax.