Meanings

boss

weir (usu. for irrigation)

microcephaly

taking the lead

to be sharp

to blank out

you cannot win against someone who doesn't listen to reason

honesty is the best policy

to raise one's head

Horsehead Nebula

black hair that has been dyed blond after the roots begin to grow in at the top giving an appearance much like custard pudding

craniate

Risso's dolphin (Grampus griseus)

short-finned pilot whale (Globicephala macrorhynchus)

pachycephalosaur (any dinosaur of infraorder Pachycephalosauria)

simple type of clothing consisting of a large piece of cloth with a hole in the middle for the head

fire brigade chief (in Edo)

diarchy

acute (of the shape of a leaf)

obtuse (of the shape of a leaf)