English Second Language - ESL

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Vocabulary - Từ Vựng: observation

a)	(a.) Inimical; unfriendly.
b)	(n.) Specifically, the act of measuring, with suitable instruments, some magnitude, as the time of an occultation, with a clock; the right ascension of a star, with a transit instrument and clock; the sun's altitude, or the distance of the moon from a star, with a sextant; the temperature, with a thermometer, etc.
c)	(n.) An artificer who makes carts; a cart maker.
d)	(v. t.) To cry up; to extol; -- followed by up.
e)	(a.) Of or pertaining to a synod; transacted in, or authorized by, a synod; as, synodical proceedings or forms.