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Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

noun a soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime

INTER.PACT Press 11511 Pine St. Seminole, FL 34642 All contents are (C) 1991, 1992, 1993 Inter.Pact THE WORLD'S FIRST NOVEL-ON-THE-NET (tm) SHAREWARE!!! — Terminal Compromise, Winn Schwartau
Dell ® TM 681510, Dell Publishing Co., Inc. Reprinted by arrangement with Dodd, Mead & Company New York, New York 10016 Printed in the United States of America Previous Dell Edition #0562 New Dell Edition First printing--June 1972 CONTENTS 1. — The Big Four, Agatha Christie

thulium, atomic number 69

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