DIRECTRIX
\da͡ɪɹˈɛktɹɪks], \daɪɹˈɛktɹɪks], \d_aɪ_ɹ_ˈɛ_k_t_ɹ_ɪ_k_s]\
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A straight line so situated with respect to a conic section that the distance of any point of the curve from it has a constant ratio to the distance of the same point from the focus.
By Oddity Software
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A straight line so situated with respect to a conic section that the distance of any point of the curve from it has a constant ratio to the distance of the same point from the focus.
By Noah Webster.
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n. A woman who governs or directs;—in geometry, the line or plane along which another line or plane is supposed to move in the generation of a plane or solid figure;—a line CD, drawn at right angles to the axis A D, when produced to a distance D from the vertex E, equal to the distance of the vertex E from the focus A.
Word of the day
Platidiam
- An inorganic water-soluble platinum complex. After undergoing hydrolysis, it reacts DNA produce both intra interstrand crosslinks. These crosslinks appear to impair replication and transcription of DNA. The cytotoxicity cisplatin correlates with cellular arrest in G2 phase cell cycle.