‖prop. n. pl. [ NL., fr. Gr. 'okta- (for 'oktw` eight) + &unr_;, &unr_;, male, man. ] (Bot.) A Linnaean class of plants, in which the flowers have eight stamens not united to one another or to the pistil. [ 1913 Webster ]
n. [ See Octa- ] (Chem.) Any one of a group of metametric hydrocarbons (C8H18) of the methane (paraffin) series. The most important is a colorless, volatile, inflammable liquid, found in petroleum, and a constituent of gasoline or ligroin. [ 1913 Webster +PJC ]
n. [ L. octans, -antis. fr. octo eight. See Octave. ] 1. (Geom.) The eighth part of a circle; an arc of 45 degrees. [ 1913 Webster ]
2. (Astron. & Astrol.) The position or aspect of a heavenly body, as the moon or a planet, when half way between conjunction, or opposition, and quadrature, or distant from another body 45 degrees. [ 1913 Webster ]
3. An instrument for measuring angles (generally called a quadrant), having an arc which measures up to 9O°, but being itself the eighth part of a circle. Cf. Sextant. [ 1913 Webster ]
4. (Math. & Crystallog.) One of the eight parts into which a space is divided by three coordinate planes. [ 1913 Webster ]
n. [ Octa- + nucleotide. ] (Chem.) A molecule composed of eight nucleotide units bound to each other by phosphodiester bonds in a linear array; as, a partial digest of DNA or RNA may include octanucleotides. See octamer. [ PJC ]
แสดงได้ทั้งความหมายของคำเดี่ยว และคำผสม ได้อย่างถูกต้อง
เช่น Secretary of State=รัฐมนตรีต่างประเทศของสหรัฐฯ (ในภาพตัวอย่าง),
High school=โรงเรียนมัธยมปลาย
