ra·di·o·i·so·tope 
(rā′dē-ō-īsə-tōp′)
(rā′dē-ō-īsə-tōp′)n.
A naturally or artificially produced radioactive isotope of an element.
- phytic acid
- phyto-
- phytochemical
- phytochemically
- phytochemist
- phytochemistry
- phytochrome
- phytoestrogen
- phytogenesis
- phytogenetic
- phytogenetical
- phytogenetically
- phytogenic
- phytogenous
- phytogeny
- phytogeographer
- phytogeographic
- phytogeographical
- phytogeography
- phytography
- phytohemagglutinin
- phytohormone
- phytol
- phytolith
- phytologic