happening or arising or located within some limits or especially surface; "internal organs"; "internal mechanism of a toy"; "internal party maneuvering"
occurring within an institution or community; "intragroup squabbling within the corporation"
breed animals or plants using parents of different races and varieties; "cross a horse and a donkey"; "Mendel tried crossbreeding"; "these species do not interbreed"
any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
acting or arriving or performed exactly at the time appointed; "she expected guests to be punctual at meals"; "he is not a particularly punctual person"; "punctual payment"