matrass /matˈrəs/

1. A long-necked chemical flask
2. A hard-glass tube closed at one end

• orthogonality
• orthogonally
• orthogonal projection
• orthograph
• orthographer
• orthographers
• orthographic
• playtimes
• play to the gallery
• play truant
• play up
• play upon
• play upon words
• play up to
• play-way
• play-ways
• play with
• play with edge tools
• play with fire
• play-world
• play-worlds
• playwright
• playwrights
• play-writer
• plaza