| phyton | Origin: NL, fr. Gr. Plant. <botany> One of the parts which by their repetition make up a flowering plant, each being a single joint of a stem with its leaf or leaves; a phytomer. Source: Websters Dictionary (01 Mar 1998) |
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| phytonadione | <chemical> 2-methyl-3-(3,7,11,15-tetramethyl-2-hexadecenyl)-1,4-naphthalenedione. A fat-soluble vitamin occurring naturally as the trans-isomer. It is used in the treatment of prothrombinaemias. Pharmacological action: antifibrinolytic agent. Chemical name: 1,4-Naphthalenedione, 2-methyl-3-(3,7,11,15-tetramethyl-2-hexadecenyl)-, (R-(R*,R*-(E)))- (12 Dec 1998) |
| phytonomy | The science of the origin and growth of plants. Origin: Phyto- + Gr. Law: cf. F. Phytonomie. Source: Websters Dictionary (01 Mar 1998) |