三葉機: triplane

画賛, 画讃: / 臥蚕: a silkworm that is resting in preparation for moulting

serious, earnest / honest

serious / earnest

(humble) meet

calculation / forecast

(rare) computer

(uranography) Winter Triangle - a bright asterism of the northern winter sky. Its corners are the stars Betelgeuse, Procyon, and Sirius.

a triangle (polygon)

spreadsheet - manual calculation of digits in the grids / (computing) spreadsheet - automatic calculation of digits in the grids by using computer.