Related Clues:

• Flat resistance to principal strategy
• Smooth wood
• Tree; aircraft
• What imitates bird in tree
• Long and narrow area skirted by cruise ship
• In two dimensions
• This flier barked?
• Ship covering area, following straight path
• — Motor; — equation
• Tree that soars into the sky
• Follower of four abandoned ideas for flier?
• Involving one dimension only
• At home in tragic role involving one dimension only
• ___ algebra
• Vector's counterpart