(astrology, collective) the twelve zodiac signs

(orthography) the sort order for kana (historically, mainly for katakana) as arranged in the 五十音図 (literally “table of the fifty sounds”)

(phonology, orthography, grammar) all Japanese morae that can be spelled with 45 single modern kana and 2 historical kana (ゐ/ヰ and ゑ/ヱ) customarily without diacritical marks (゛ and ゜), excluding っ and ん, arranged in a 5x10 table (五十音図 (gojūonzu, literally “table of the fifty sounds”)), used for phonological and grammatical analysis

重水素: heavy hydrogen

一日中: all day, throughout the day, sunrise to sunset, all around the clock

一部始終: the whole story

十三参り: A celebration for girls who have reached the age of thirteen.

優柔不断: indecision

(astronomy) Crux; the Southern Cross

操縦桿: (aviation) control stick