bloom1
¦ verb
1. produce flowers; be in flower.
2. be or become very healthy.
3. technical coat (a lens) with a special surface layer to reduce reflection.
¦ noun
1. a flower, especially one cultivated for its beauty.
the state or period of blooming: the apple trees were in bloom.
2. a youthful or healthy glow in a person's complexion.
3. a delicate powdery surface deposit on fruits, leaves, or stems.
4. a full, bright sound in a musical recording.
5. a rapid growth of microscopic algae or cyanobacteria in water resulting in a coloured scum on the surface.
Origin
ME: from ON blom 'flower, blossom', blomi 'prosperity', blomar 'flowers'.
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bloom2
¦ noun a mass of iron or steel hammered or rolled into a thick bar for further working.
?historical an unworked mass of puddled iron.
¦ verb [usu. as noun blooming] make (metal) into such a mass.
Origin
OE bloma, of unknown origin.