(mathematics) squaring

(mathematics) square

(mathematics) squaring

a male given name

two daughters / the second daughter

elderly / grandparents

(Japanese folklore) Shapeshifting monster, 妖怪 (yōkai), which for a ruse takes the form of either a helpless baby or tiny old man, crying near woodland trails and crushes passersby who stop to help as it transforms to devour them.

(literary) self-possessed; composed; collected; calm and at ease

preface by the author / prefacing one's book

An expert or someone who is quite knowledgeable about certain situations, especially the background of certain matters.