hygrom'eter (Gr. adj. hu'gros, wet), an instrument for measuring the degree of moisture of the atmosphere.
pentam'eter (Gr. pen'te, five), a line of five poetic feet.
perim'eter, the external boundary of a body or figure.
sym'metry, the proportion or harmony of parts.
thermom'eter (Gr. adj. ther'mos, warm), an instrument for measuring the heat of bodies.
trigonom'etry (Gr. n. trigo'non, a triangle), a branch of mathematics.
18. MON'OS (μονος), sole, alone.
mon'achism, the condition of monks; a monastic life.
mon'ad, something ultimate and indivisible.
mon'astery, a house of religious retirement.