(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”)

(formal) [I, we] wish you a happy new year (literally meet a good year)