1. hypoactive abnormally inactive
  2. collective security a system for international peace
  3. hypocritical professing feelings or virtues one does not have
  4. psychosexual of or relating to the mental or emotional attitudes about sexuality
  5. hypophyseal of or relating to the hypophysis
  6. radioactive material material that is radioactive
  7. radioactive decay the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation
  8. vocative case the case (in some inflected languages) used when the referent of the noun is being addressed
  9. Hypoxidaceae in some classification systems included in the Amaryllidaceae
  10. hypoglossal supplies intrinsic muscles of the tongue and other tongue muscles
  11. hypoxic hypoxia hypoxia resulting from defective oxygenation of the blood in the lungs
  12. psychoactive substance a drug that can produce mood changes and distorted perceptions
  13. Hypoxis hirsuta perennial star grass of North America
  14. active citizen a citizen who takes an active role in the community
  15. hypocritically in a hypocritical manner
  16. objective case the case of nouns serving as the direct object of a verb
  17. reproductive system organs and tissues involved in the production and maturation of gametes and in their union and subsequent development as offspring
  18. reproductive cell a spermatozoon or an ovum
  19. radioactive dust the radioactive particles that settle to the ground after a nuclear explosion
  20. formative cell a cell of an embryo

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