noun🔗Share日晷指针，表针，日影柱。 An object such as a pillar or a rod that is used to tell time by the shadow it casts when the sun shines on it, especially the pointer on a sundial."The gnomon on the sundial in the park cast a long shadow, indicating it was late afternoon. "公园里日晷的**表针（日影柱）**投下了长长的影子，表明已经是傍晚时分了。timeastronomytechnologyphysicsarchitecturesciencehistoryChat with AIVocabulary GamePractice Reading
noun🔗Share日晷的指针，表针. An object such as a pillar used by an observer to calculate the meridian altitude of the sun (that is, the altitude of the sun when it reaches the observer's meridian), for the purpose of determining the observer's latitude."The student used a simple gnomon, a stick in the ground, to measure the sun's highest point at midday and then calculate the latitude of their school. "这个学生用一个简易的日影标，也就是插在地里的一根棍子，测量了正午时太阳的最高点，然后计算出他们学校的纬度。astronomytechnologygeographymathsciencephysicsspacetimeChat with AIVocabulary GamePractice Reading
noun🔗Share日晷指针，晷针。 The index of the hour circle of a globe."The teacher pointed to the globe and explained that the gnomon, a small rod extending from the North Pole, cast a shadow to show the current hour on the hour circle. "老师指着地球仪解释说，那个从北极伸出的小杆，也就是日晷指针/晷针，投下的阴影可以指示时间圈上当前的时刻。astronomytimemathtechnicalsciencedeviceChat with AIVocabulary GamePractice Reading
noun🔗Share格规，残矩。 A plane figure formed by removing a parallelogram from a corner of a larger parallelogram."The architect's drawing showed a gnomon, a shape formed by cutting a smaller rectangle from one corner of a larger rectangle. "建筑师的图纸上画了一个残矩，也就是从一个大长方形的一个角上切掉一个小长方形后剩下的形状。mathfigureChat with AIVocabulary GamePractice Reading
noun🔗Share差数，增量。 (by extension) A number representing the increment between two figurate numbers."In the sequence of square numbers (1, 4, 9, 16...), the gnomon between 9 and 16 is 7, representing the number of additional points needed to expand a 3x3 square into a 4x4 square. "在平方数序列（1, 4, 9, 16...）中，9和16之间的差数（也就是这里的“gnomon”）是7，它代表了将一个3x3的正方形扩展成一个4x4的正方形所需要增加的点的数量。mathnumberChat with AIVocabulary GamePractice Reading
