• Webster's Revised Unabridged Dictionary
    • v. t irradicate ĭr*răd"ĭ*kāt To root deeply.
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Century Dictionary and Cyclopedia
    • irradicate To fix by the root; fix firmly.
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Chambers's Twentieth Century Dictionary
    • v.t Irradicate i-rad′i-kāt to fix firmly.
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In science:

Over this range of irradiations, the measured threshold dispersion was almost unchanged, and the noise increased by 15-25 % in comparison to pre-irradation values.
Prototype ATLAS IBL Modules using the FE-I4A Front-End Readout Chip
H+ irrad. after H+ irrad. one year after irrad.
Induced Magnetic Order by Ion Irradiation of Carbon-Based Structures
On the other hand, in the disk dissipation models of Alexander et al. (2006ab) EUV irradation of the disk produces a 10, 000 K flow with a velocity of ∼ 10 km s−1 from the disk surface, near the gravitational radius rg (see also Hollenbach & Gorti 2007).
High-resolution Spectroscopy of [Ne II] Emission from TW Hya