fering), _that part of medicine which
treats of the causes and nature of diseases_.

PHILOL'OGY (Gr. _phil'os_, loving, fond of), _the science which treats of
languages_.

PHRENOL'OGY (Gr. n. _phren_, the mind), _the art of reading the mind from
the form of the skull_.

PHYSIOL'OGY (Gr. n. _phu'sis_, nature), _the science which treats of the
organism of plants and animals_.

PRO'LOGUE, _verses recited as introductory to a play_.

PSYCHOL'OGY (Gr. n. _psu'che_, the soul), _mental philosophy; doctrine of
man's spiritual nature_.

SYL'LOGISM, _a form of reasoning consisting of three propositions_.

TAUTOL'OGY (Gr. _tau'to_, the same), _a repetition of the same idea in
different words_.

TECHNOL'OGY (Gr. n. _tech'ne_, art), _a description of the arts_.

THEOL'OGY. See _theos_.

TOXICOL'OGY (Gr. n. _tox'icon_, poison) _the science which treats of
poisons and their effects_.

ZOOL'OGY (Gr. n. _zo'on_, an animal), _that part of natural history which
treats of animals_.

17. MET'RON _a measure_.

ME'TER, _arrangement of poetical feet; a measure of length_.

MET'RIC, _denoting measurement_.

MET'RICAL, _pertaining to meter_.

ANEMOM'ETER (Gr. n. _an'emos_, the wind), _an instrument measuring the
force and velocity of the wind_.

BAROM'ETER (Gr. n. _ba'ros_, weight), _an instrument that indicates changes
in the weather_.

DIAM'ETER, _measure through anything_.

GEOM'ETRY (Gr. n. _ge_, the earth), _a branch of mathematics_.

HEXAM'ETER (Gr. _hex_, six), _a line of six poetic feet_.

HYDROM'ETER (Gr. n. _hu'dor_, water), _an instrument for determining the
specific gravities of liquids_.

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, _sole, alone_.

MON'ACHISM, _the condition of monks; a monastic life_.

MON'AD, _something ultimate and indivisible_.

MON'ASTERY, _a house of religious retirement_.

MONK (Gr. n. _mon'achos_), _a religious recluse_.

MONOG'AMY (Gr. n. _gam'os_, MARRIAGE), _the marriage of one wife only_.

MON'OLOGUE (Gr. n. _log'os_), _a speech uttered by a pe