Phe*nol"o*gy(?), n. [Contracted from Phenomenology.] (Biol.) The science of the relations between climate and periodic biological phenomena, as the migrations and breeding of birds, the flowering and fruiting of plants, etc. -- Phe`no*log"ic*al (#), a. -- Phe`no*log"ic*al*ly, adv. -- Phe*nol"o*gist (#), n.
[Webster 1913 Suppl.]
Phe`nol*phthal"e*in(?), n., or
Phenol phthalein. (Chem.) A white or yellowish white crystalline substance, C20H14O4, formed by condensation of the anhydride of phthalic acid and phenol. Its solution in alkalies is brilliant red, but is decolorized by acids. This reaction, being very delicate, is used as an indicator. It is sometimes used as a laxative in veterinary medicine.
[Webster 1913 Suppl. +PJC]
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Wed 19th December 2018