| A | B |
|---|
| epidermis | the outer protective layer of skin |
| herbicide | a substance used to kill plants (weeds) |
| invisible | impossible to see; not accessible by view |
| morphology | the study of the forms of organisms |
| octagon | an eight-sided figure |
| orthodontist | a dental specialist who prevents and corrects irregularities of teeth |
| postnatal | of or occurring after birth |
| retrospect | a review, survey, contemplation of things in the past |
| submarine | machine operating under water |
| terrarium | a small enclosure where land animals like turtles are kept |
| postpone | to delay |
| terrain | land, ground, earth |
| videlicet | "see" that it is permissable; namely |
| herbage | plant life |
| diagonal | a direction slanting across |
| retrovirus | a virus that works backward |
| orthodontia | the practice of making teeth straight or right |
| episode | an event or happening |
| morphologist | one who studies the forms of things |
| subsonic | relating to speeds slower than sound |
| retrograde | retreat; move back |
| terra cotta | a reddish brown earthenware |
| posthumous | occurring after death |
| metamorphosis | a change in form |
| tetragon | a four-sided figure |
| epitaph | an inscription on a tombstone |
| submerge | to put under the surface of the water |
| herbarium | a collection of dried plants |
| orthography | spelling; "writing straight" |
| visionary | one who sees vivid pictures from imagination, the future |
