(genetics) X chromosome

(genetics) sex chromosome

(CJK typography) rounded sans-serif

trypophobia

(organic chemistry, dated, deprecated by IUPAC) geometric isomer: a molecule that exhibits geometric isomerism

(anatomy) a pyramidalis muscle

two sides of the same coin

(physics, astronomy) black-body radiation

(typography) a typestyle that mimics the look of 隷書 (reisho, “clerical script”) being stamped (thus, with broken and irregular strokes) rather than handwritten; this "ancient seal" look arose in Nara-period Japan, and has no relation to the original Chinese 篆書 (tensho, “seal script”)

If one learns without thinking, one will be lost in his learning. That is, if one does not think about what one learns, he will not arrive at the truth of it.