繊度 is read as せんど (sendo) and means fineness.
せんど
sendo
せんい
fibre
せんさい
sensitive
せんいこうぎょうこうぞうかいぜんじぎょうきょうかい
Textile Industry Restructuring Agency
せんいひょうかぎじゅつきょうぎかい
Japan Textile Evaluation Technology Council
せんいきょうか
fibre-reinforced (plastic, concrete, etc.) (fiber)
せんいきょうかぷらすちっく
fiber-glass reinforced plastics
せんいこうぎょう
textile industry
せんいこうじょう
textile mill
せんいこうがく
fiber optics
せんげつ
crescent moon
せんいせい
fibrous
せんいそげん
fibrinogen