List of Words for Letter ‘R’
Click on 
to hear the word and definition
-
reactant
an original substance at the beginning of a chemical reaction
-
reactivity
the ability of elements to take part in chemical reactions
-
reclamation
the act of recycling or restoring something to a usable state
-
record data
to make note of an observation in a permanent way, as in writing
-
rectum
the last part of the large intestine
-
renal
having to do with the kidneys
-
reproduction
the process of creating more of the same kind of organism
-
reproductive system
the organ system that produces offspring
-
reptile
a land vertebrate with thick, dry, scaly skin
-
reservoir
a man-made lake that stores water for later use
-
respiration
the life process in which energy is released from food (sugar)
-
respiratory system
the organ system that brings oxygen to body cells and removes waste gas
-
root
the part of a plant that absorbs water and mineral, stores food, and anchors the plant