叶

to be in harmony

leaf / page / lobe / (historical) period / classifier for small boats / a surname

ten / 10

mouth / classifier for things with mouths (people, domestic animals, cannons, wells etc) / classifier for bites or mouthfuls

clover / trefoil

Shia (a movement in Islam)

Shia sect (of Islam)

mid- (e.g. mid-century) / middle period

trilobite

lit. eyes obscured by a single leaf (idiom) / fig. not seeing the wider picture / can't see the wood for the trees

Chinese horse chestnut (Aesculus chinensis)

the first half (of a period)

blade

early part (of a decade, century etc) / the first years

Chiba (Japanese surname and place name)

Chiba prefecture, Japan

lit. the falling of one leaf heralds the coming of autumn (idiom) / fig. a small sign can indicate a great trend / a straw in the wind

Trifid Nebula M20

incomplete leaf

alternate phyllotaxy (leaf pattern)

Charles Fourier (French sociologist and socialist, 1772-1837)

(math.) Fourier transform

Jean-Baptiste-Joseph Fourier (French mathematician, 1768-1830)

ice plant (Mesembryanthemum crystallinum)