Meanings

characteristic vibration

solid-state chemistry

rigidity (e.g. muscular)

fixed-lens camera

pinned tweet (tweet that always appears at the top of one's account page)

pinned tweet

having one's guard up

solid food

carbon fixation

carbon fixation

non-crystalline solid

carbon dioxide fixation

onomastics

solid fat

solid-state battery

fixed price

fixed-price purchase system (electricity)

feed-in tariff system (e.g. solar power)

characteristic polynomial

proper adjective