12-Letter Words Containing: I,M,P,O,P,O,_,_

• (genetics) the genetic variation within a population that natural selection can operate on

• (chemistry) the existence of different kinds of crystal of the same chemical compound

• (biology) the existence of two or more forms of individuals within the same animal species (independent of sex differences)

• a mineral consisting of lead chloride and phosphate; a minor source of lead

• Of, relating to, or resulting from the retention of juvenile characteristics by an adult.

• The tetravalent positively-charged phosphorus cation R4P+

• massive thick-skinned herbivorous animal living in or around rivers of tropical Africa

• (chemistry) the existence of different kinds of crystal of the same chemical compound

• (biology) the appearance of two or more distinctly different forms in the life cycle of some organisms

• an orienting response to light

• a morphine derivative that is not as strong as morphine; used as an emetic and in small doses as a sedative